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: Pathology
Antigen absent in Bombay blood group-a)  Hb)  Ac)  Bd)  D 
Select and explain. 
A. abc, B. bc, C. acd, D. bcd
A: abc
Answer: A: abc 
Explanation: " Bhende et al (1952) from Bombay reported the very rare instatnce in which A and B antigens as well as the H antigens are absent from red cells. This is known as Bombay or OH blood"