In this error-spotting question, identify which part of the sentence contains an error: "Roger dressed (A) / in is best shirt, (B) / silver tie and black jacket (C) / No Error (D)".

Introduction / Context:
Error-spotting questions not only test grammar but also your ability to detect small slips such as missing letters or wrong pronouns. The sentence given is "Roger dressed (A) / in is best shirt, (B) / silver tie and black jacket (C) / No Error (D)." At first glance, the sentence almost looks correct, but there is a subtle error in one part that you must identify.

Given Data / Assumptions:

• Part A: "Roger dressed".
• Part B: "in is best shirt,".
• Part C: "silver tie and black jacket".
• Part D: "No Error".
• We are looking for an error in spelling or grammar that affects meaning.

Concept / Approach:
The idea is that Roger is wearing his best shirt, a silver tie and a black jacket. The problem appears in part B, where "is" is used instead of "his." The correct possessive pronoun before "best shirt" should be "his" to show that the shirt belongs to Roger. Apart from this, the sentence structure is correct: "Roger dressed in his best shirt, silver tie and black jacket." Therefore, the error lies in part B and that is the answer.

Step-by-Step Solution:
Step 1: Read part A "Roger dressed." This is a correct and complete subject-verb combination indicating he got dressed.Step 2: Read part B "in is best shirt," and check each word carefully.Step 3: Recognise that "is best shirt" should be "his best shirt" for correct possession.Step 4: Confirm that "is" is a verb form and cannot function as a possessive determiner before "best shirt."Step 5: Read part C "silver tie and black jacket" and note that it smoothly continues the list of clothing items.Step 6: Since only part B contains an error, choose "B" as the answer.

Verification / Alternative Check:
Rewrite the sentence correctly as a whole: "Roger dressed in his best shirt, silver tie and black jacket." This version sounds natural and grammatical. If we kept "is" in the sentence, it would read "Roger dressed in is best shirt," which is clearly wrong. No other part of the sentence shows an issue with tense, agreement or punctuation, so all evidence points toward part B as the erroneous portion.

Why Other Options Are Wrong:
Part A contains a simple past verb "dressed" and is perfectly acceptable. Part C correctly lists two more clothing items joined by "and," and its structure is fine. Part D "No Error" would be correct only if all three sentence parts were error free, which they are not because of the misused "is" in part B. Therefore, A, C and D cannot be chosen as they either misidentify the error or deny that an error exists.

Common Pitfalls:
Because "is" and "his" are very similar in appearance and pronunciation, some candidates read quickly and overlook the missing "h." Others assume that exam errors must be more complex and search for a tense or preposition mistake instead of checking pronouns. The best strategy is to read each part slowly and aloud in your mind, listening for anything that sounds wrong. Simple slips like incorrect pronouns are common in competitive exams and can be easy marks if you focus carefully.

Final Answer:
The error is in part B; it should read "in his best shirt," so the correct answer is B.