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Which among the following statements is/are true?
1) Apart from blood groups – O, A, B and AB, there is a special type of blood group (hh)
2) ‘A’ type blood can accept blood from ‘A’ type or ‘O’ type and not from ‘AB’ or ‘B’ type donors
3) The main reason behind the difference in blood of human is the glyco protein which is found in RBC called antigen
Which of the statements given above is/are correct?

2 and 3 only
1 and 2 only
1 and 3 only
All of the above
Explanation:

• Apart from blood groups – O, A, B and AB, there is a special type of blood group (hh)
• (hh)- a rare special blood group first discovered in Bombay in 1952, and hence christened as Bombay Blood.
• People who carry this rare blood type, about 1 in 10, 000 Indians, can accept blood only from another Bombay Blood type individual, and not from anyone who is O, A, B or AB type.
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