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 sentence containing no grammatical or contextual error is: He suggested that the matter should be taken up with the senior officer.

Step-by-Step Educational Explanation:

1. Analysis of Sentence 1 (Correct):
"He suggested that the matter should be taken up with the senior officer."
This sentence uses the verb "suggested" correctly with a "that"-clause containing "should + base verb" ("should be taken up"). The passive voice construction ("be taken up with") is grammatically sound and contextually appropriate.

2. Analysis of Sentence 2 (Incorrect):
"The manager told to his staff that the office will remain shut tomorrow."
Error: The verb "told" is transitive when introducing an indirect object and does not take the preposition "to". It should be "told his staff". Additionally, indirect speech following a past tense reporting verb ("told") requires tense backshifting ("will" should be "would").

3. Analysis of Sentence 3 (Incorrect):
"She is more experienced and also more older than the other candidates."
Error: Double comparative construction. "Older" is already comparative, so adding "more" ("more older") is redundant and grammatically incorrect. It should be "older".

4. Analysis of Sentence 4 (Incorrect):
"Neither of the two witnesses were present at the time of the hearing."
Error: Subject-verb agreement error. The pronoun "Neither" refers to "neither one" and takes a singular verb. "Were" should be replaced with "was" ("Neither of the two witnesses was present...").