Discussion
Assertion (A) : Red colour of blood is due to haemoglobin.
Reason (R) : Haemoglobin is a red pigment.
Answer: A
Correct answer: Both A and R are true and R is the correct explanation of A.
Haemoglobin, the iron-bearing protein in the red cells, is itself a red pigment, and it is present in such quantity that it gives blood its colour. The reason states exactly the cause. Both are true and R explains A.
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