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: Skin
Chandu 32 years male presents with abdominal pain and vomitting. He also complain of some psychiatric symptoms & visual hallucination. Most likely diagnosis is 
Select and explain. 
A. Hypothyroidism, B. Hypehyroidism, C. Hysteria, D. Intermittent Porphyria
D: Intermittent Porphyria
Answer: D: Intermittent Porphyria 
Explanation: D i.e. Intermittent porphyria