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: Biochemistry
Heme is which porphyrin 
Select and explain. 
A. Type I, B. Type II, C. Type III, D. Type IV
C: Type III
Answer: C: Type III 
Explanation: Ans. is 'c' i.e., Type III