This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Diwali poisoning is due to - 
Select and explain. 
A. Phosphorus, B. Arsenic, C. Mercury, D. Lead
A: Phosphorus
Answer: A: Phosphorus 
Explanation: A > CMercury was leading cause of poisioning during mainly due to fire crackers like Pharoa's serpent (black tablet like fire cracker). Phosphorus was second leading cause of Diwali poisioning, but in recent times fire crackers like Pharoa's serpent have fallen in use, this has resulted in Phosphorus being leading of Diwali Poisoning.