Assertion (A) : Mature RBC is devoid of a nucleus.
Reason (R) : In order to carry more oxygen, it may contain more haemoglobin.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Assertion (A) is true: Mature red blood cells (RBCs) in humans and most mammals are devoid of a nucleus. During their maturation process, RBCs lose their nucleus to create more space for hemoglobin, the protein responsible for carrying oxygen.
Reason (R) is true and explains A correctly: The absence of a nucleus in mature RBCs allows them to have more space to accommodate a higher concentration of hemoglobin. Hemoglobin is essential for oxygen transport, and by having more hemoglobin, RBCs can efficiently carry and deliver oxygen throughout the body.
Therefore, both the Assertion and Reason are true, and Reason (R) is the correct explanation of Assertion (A). Hence, option 1 is the correct answer.