In the following sentence about Chilika Lake, identify the part that contains a grammatical error or select the "No Error" option:\n"Chilika is the largest brackish water lagoon in Asia."

Introduction / Context:
This question is a classic error-spotting item in English grammar. The sentence describes Chilika, a famous lake in India, and you are asked to decide which underlined part (1, 2, 3) contains an error, or to choose the "No Error" option, labelled as part 4. Such questions test your ability to recognise correct sentence structure, article use, and noun phrases in standard written English.

Given Data / Assumptions:

• The sentence is divided as: (1) Chilika is the (2) largest brackish water (3) lagoon in Asia. (4) No Error.
• "Chilika" refers to Chilika Lake in Odisha.
• "Largest brackish water lagoon in Asia" is meant as a descriptive noun phrase.
• We assume neutral, formal descriptive English as used in textbooks and exam passages.

Concept / Approach:
The key concepts are correct article usage and formation of noun phrases. The pattern "X is the largest Y Z in Asia" is perfectly valid, where Y and Z form a compound noun or noun plus classifier. "Brackish water lagoon" is a standard environmental phrase; "brackish water" describes the type of water, and "lagoon" is the primary noun. We therefore examine each segment to see whether there is any disagreement in tense, number, or article usage.

Step-by-Step Solution:
Step 1: Analyse part (1): "Chilika is the". The subject "Chilika" takes the singular verb "is", and "the" begins a definite noun phrase. This is grammatically correct.Step 2: Analyse part (2): "largest brackish water". Here "largest" is a superlative adjective modifying "brackish water lagoon". Superlatives usually take "the", which is already present before "largest". The sequence "the largest brackish water" is therefore grammatically sound as part of the full phrase.Step 3: Analyse part (3): "lagoon in Asia." The noun "lagoon" is correctly singular, and the prepositional phrase "in Asia" is correct to specify the location. There is no error in spelling or structure.Step 4: Since parts (1), (2), and (3) are all correct, we conclude that there is no grammatical error, so part (4) "No Error" is the right choice.

Verification / Alternative check:
Rephrase the sentence to see if it still feels natural: "Chilika is the largest brackish water lagoon in Asia." This is exactly how environmental science texts and encyclopaedia entries describe Chilika Lake. You could also compare similar sentences, such as "X is the largest freshwater lake in India" or "Y is the highest mountain in the world", which follow the same grammatical template. The match in pattern confirms that the original sentence is correct.

Why Other Options Are Wrong:

• Option 1: "Chilika is the" is grammatically correct; there is no subject–verb agreement issue.
• Option 2: "largest brackish water" correctly functions as the beginning of a compound noun phrase and does not need an additional article.
• Option 3: "lagoon in Asia" is a proper noun phrase with an appropriate prepositional phrase indicating location.

Common Pitfalls:
Some learners might suspect that "brackish water" must be hyphenated or that another article is required, for example "a largest brackish water lagoon". This is incorrect; superlatives almost always use "the" before them, not "a". Another pitfall is overthinking regional names or believing that "in Asia" should be replaced with "of Asia". While both can be encountered, "in Asia" is perfectly correct and widely accepted. Overcorrecting well-formed phrases is a common exam trap.

Final Answer:
The sentence is grammatically correct as written, so the correct choice is part (4), "No Error".