The given notice is put up by the school authority requesting the office bearers of the Science Society to attend a meeting with the principal. As it is a formal notice, it is in passive voice. The verb, 'are' is used as the subject (office bearers of Science society) is in plural form. Option C is the correct answer.
The corrected sentence is: 'The office bearers of the Science Society are requested to attend a meeting with the principal'.
Option A is incorrect as the verb, 'is' cannot be used with a plural subject.
The sentences in a notice are usually in future tense or present tense forms.
Option B is incorrect as the verb, 'requested' is in simple past tense which cannot be used in a notice for a meeting to be held in future.
Option D is incorrect as 'have requested' is in present perfect tense.