The correct option is B The public’s support has been appreciated by AK.
The correct answer is ‘The public’s support has been appreciated by AK.’ This is because in passive voice, the receiver of the action appears first and since the receiver is singular, ‘the public’s support’, the singular form of the helping verb, ‘has’ is used. It is followed by the ‘be’ verb form ‘been’, the past participle form of the main verb ‘appreciate’ which is, ‘appreciated’, the preposition ‘by’ and the doer of the action, ‘AK.’