what is the IPC for humiliation of any woman

It depends on facts of the case and the duty of a citizen is only to make a complaint before police, police have to investigate and register a complaint stating such applicable section on the basis of facts and it is left to the competent court to decide the punishment on charges of such cybercrime and harassment.  Please search in google for more details with keywords "Humilation of a woman in social media" (Outraging the modesty of women is same whether it is oral, verbal, written or in social media and in addition to defamation)

Be specific in your complaint to police.