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)

India continues to face (A)/ several inherent challenges (B)/ to the realm of sustainable (C)/ consumption and production (D).

The correct option is C.

Detailed Explanation:

The sentence is divided into four parts: (A), (B), (C), and (D).

Let's analyze the grammatical structure of each part:

1. Part (A): "India continues to face" - Here, "India" is a singular subject followed by the singular present-tense verb "continues" and the infinitive "to face". This part is grammatically correct.

2. Part (B): "several inherent challenges" - "several" appropriately modifies the plural noun "challenges", and "inherent" acts as an adjective describing the challenges. This part is grammatically correct.

3. Part (C): "to the realm of sustainable" - Here lies the error. The noun "challenge" takes the preposition "in" (or sometimes "within") when referring to an area, domain, or realm. Using the preposition "to" in this context is idiomatically incorrect. Therefore, "to the realm" should be replaced with "in the realm".

4. Part (D): "consumption and production" - This part completes the phrase "sustainable consumption and production" correctly and has no errors.

Corrected Sentence:

"India continues to face several inherent challenges in the realm of sustainable consumption and production."

Hence, the grammatical error is in part (C).