Find out whether there is any grammatical error in below sentence. Mohan has collected / all the necessary documents / and have written a good paper / for this conference.

The correct answer is: E. No error

The sentence is grammatically correct. The verb “has” agrees with the subject “Mohan,” which is singular. The verb “written” is also in the past tense, which is consistent with the time frame of the sentence. The preposition “for” is used correctly to indicate the purpose of the paper.

Here is a brief explanation of each option:

• Option A: “Mohan has collected” is grammatically correct. The verb “has” agrees with the subject “Mohan,” which is singular.
• Option B: “all the necessary documents” is grammatically correct. The article “all” is used to indicate that Mohan has collected all of the documents that are necessary.
• Option C: “and have written a good paper” is grammatically incorrect. The verb “have” does not agree with the subject “Mohan,” which is singular. The correct verb form would be “has written.”
• Option D: “for this conference” is grammatically correct. The preposition “for” is used to indicate the purpose of the paper.
• Option E: “No error” is the correct answer. The sentence is grammatically correct.