Read each sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in one part of the sentence. The number of that part is the answer. If there is ‘No error’, the answer is ‘e’. (Ignore errors of punctuation, if any)

Poorest citizens of a (A)/ country frequently bear (B)/ the burden of the costs (C)/ associated with development. (D)

Correct Answer: Option A

Detailed Explanation:

1. Understanding the Grammar Rule:
In English grammar, superlative adjectives (such as poorest, tallest, best, most important) are used to describe a noun that has a quality to a greater degree than any other in its class. Standard grammar rules mandate that a superlative adjective must always be preceded by the definite article "the" when referring to a specific group or noun (e.g., "the poorest citizens").

2. Analyzing Part (A):
Part (A) reads: "Poorest citizens of a".
Here, the superlative adjective "Poorest" is missing the definite article "the". To make the phrase grammatically correct, it should be written as: "The poorest citizens of a".

3. Reviewing the Remaining Parts:
• Part (B): "country frequently bear" - Subject-verb agreement is correct ("citizens" is plural, matching the plural verb "bear").
• Part (C): "the burden of the costs" - Uses correct prepositional phrases and premodifiers.
• Part (D): "associated with development." - Correct usage of the participle phrase modifying "costs".

Conclusion:
The grammatical error lies in part (A) due to the omission of the definite article "the" before the superlative adjective "poorest". Therefore, the correct option is A.