I believe the answer is: C. He is the son of the previous leader, Benazir Bhutto, who was assassinated.
Biwal is the son of ex-president Asif Ali Zardari and ex-prime minister benazir bhutto who was arrested and assasinated because of massive corruption and bribery scandal. But, his parents' influence still remained strong in the Pakistan's people party which opened up the path for Biwal to be a strong candidate for pakistan's presidential election.