Correct option is C
Option (c) contains an error.
Error: "India will agree" is incorrect in this context. The agreement has already been concluded, so future tense "will agree" should be changed to past tense.
Correction: "India agreed to reduce"
Grammatical rule used:
Tense consistency — when referring to an event in the past (like a concluded agreement), the verbs used must also be in past tense.
Example:
Incorrect: He will agree to the terms that were finalized yesterday.
Correct: He agreed to the terms that were finalized yesterday.