Correct option is A
Option (a) contains an error.
Explanation: The subject "Each and every one" is singular. Even though it refers to multiple people, the structure of the phrase requires a singular verb. Therefore, "want" should be replaced with "wants." This is an issue of subject-verb agreement.
Grammatical rule used:
When using phrases like "Each and every one," the subject is considered singular, and it should be followed by a singular verb.
Example:
Incorrect: Each and every one of the students want to participate.
Correct: Each and every one of the students wants to participate.
Corrected sentence: Each and every one of them wants to discuss the post-production amount.