In the following questions, few sentences are given. Choose and mark the sentence which contains no grammatical or contextual error in it. If all the sentences are grammatically and contextually incorrect, mark "All are incorrect" option as the answer choice.

The correct option/answer is: The captain, along with his players, was felicitated at the ceremony.

Let us analyze each sentence step-by-step to identify why this sentence is grammatically correct while the others contain errors:

1. "She insisted on him to apologise before the entire gathering at once." (Incorrect)
The verb insist is typically followed by the preposition on/upon + gerund (ing form), or a that-clause (e.g., "insisted that he apologise"). Using "insisted on him to apologise" is ungrammatical. The correct structure should be "She insisted on his apologizing..." or "She insisted that he apologise...".

2. "The furniture in all the rooms were damaged during the heavy storm." (Incorrect)
The word furniture is an uncountable (singular) noun. Therefore, it requires a singular verb. Here, the plural verb "were" is used incorrectly instead of the singular verb was ("The furniture ... was damaged").

3. "He admitted to have made a mistake while preparing the final report." (Incorrect)
The verb admit takes either a gerund (admitted to having made / admitted making) or a that-clause (admitted that he had made). Using the infinitive structure "admitted to have made" is incorrect. The correct sentence would be "He admitted to having made a mistake...".

4. "The captain, along with his players, was felicitated at the ceremony." (Correct)
When two subjects are connected by phrases like along with, together with, as well as, or in addition to, the verb agrees with the primary (first) subject. Here, the first subject is "The captain", which is singular. Thus, the singular auxiliary verb "was felicitated" is grammatically correct.