In this error spotting question on English grammar, identify the incorrect part in the sentence: "One of the most interesting feature of travel in Himachal Pradesh is is the large number of travellers lodges provided by the State Government."

Introduction / Context:
This question focuses on subject verb agreement and correct noun form in English. The sentence is "One of the most interesting feature of travel in Himachal Pradesh is is the large number of travellers lodges provided by the State Government." Even though the meaning is clear, the structure contains a grammatical problem in one segment. Learners must pay attention to patterns like "one of the" followed by a plural noun, and ensure the verb matches the real subject of the clause. Such questions train students to notice subtle but important agreement rules.

Given Data / Assumptions:

• The sentence talks about travel in Himachal Pradesh and facilities provided by the State Government.
• Segment (a) is "One of the most interesting feature of travel in Himachal Pradesh is".
• Segment (b) is "is the large number of travellers’ lodges".
• Segment (c) is "provided by the State Government."
• Segment (d) is "No error".
• We assume standard written English conventions used in competitive exams.

Concept / Approach:
The pattern "one of the" is always followed by a plural noun, because we are selecting a single item from a group of many. Therefore, the noun after "the most interesting" should be "features" and not "feature". This makes segment (a) incorrect. The core correct structure should be "One of the most interesting features of travel in Himachal Pradesh is the large number of travellers lodges provided by the State Government." The repeated "is" between segments (a) and (b) is a formatting issue in the way the sentence was split, but the clearly tested rule involves the noun after "one of the".

Step-by-Step Solution:
Step 1: Identify the important pattern "one of the most interesting feature of travel in Himachal Pradesh". Step 2: Recall the rule that "one of the" must be followed by a plural noun such as "features", "students", or "books". Step 3: Notice that the sentence uses the singular noun "feature" instead of the required plural "features". Step 4: Understand that the logically correct noun phrase should be "one of the most interesting features of travel in Himachal Pradesh". Step 5: Check segments (b) and (c), which state "is the large number of travellers lodges provided by the State Government", and see that this part matches the idea of one particular interesting feature. Step 6: Conclude that segment (a) is the only part with the grammatical error under the usual exam rule being tested.

Verification / Alternative check:
We can rewrite the sentence in correct form to verify: "One of the most interesting features of travel in Himachal Pradesh is the large number of travellers lodges provided by the State Government." Now, read the sentence smoothly and observe that the structure sounds natural. The subject phrase "one of the most interesting features" is grammatically complete and correctly plural after "one of the". The verb "is" links this subject to the complement "the large number of travellers lodges". This confirms that the only clear grammatical problem in the original sentence lies in the use of "feature" instead of "features" in segment (a).

Why Other Options Are Wrong:
Option (b) "is the large number of travellers’ lodges" works as a complement to the subject and is structurally correct. Option (c) "provided by the State Government." correctly functions as a relative clause explaining who provides the lodges. Option (d) "No error" cannot be chosen because there is a clear disagreement between "one of the" and the singular noun "feature" in segment (a).

Common Pitfalls:
Learners often read quickly and miss the plural requirement after "one of the". They focus more on the information about lodges and the State Government and ignore the base structure of the noun phrase. Another common mistake is to get distracted by minor wording details or repeated words and to overlook the underlying rule. To avoid this, whenever you see "one of the", automatically check that the following noun is plural. Regular practice with such patterns makes it easier to catch agreement errors during exams.

Final Answer:
The mistake occurs in option (a) where "feature" should be "features". Therefore, the correct answer is "One of the most interesting feature of travel in Himachal Pradesh is".