Q. Consider the following Statements :
  1. The most common blood group is O(+)
  2. The rarest Blood Group is AB(-)
  3. O(-) group is the universal donor.
  4. AB(+) group is the universal recipient.
Which of the above Statement(s) is/are correct?

Answer: All of them
Notes:
  1. True - Blood group O positive (O+) is the most common blood group globally as well as in India.
  2. True - AB negative (AB-) is the rarest blood group found in humans.
  3. True - O negative (O-) blood can donate to all groups and is the universal donor.
  4. True - AB positive (AB+) can receive blood from all groups and is the universal recipient.
Since all four statements are factually correct regarding blood groups, the answer is D.