Q1. [1] medium initial-understanding
Assertion (A): In human beings, the blood that returns to the heart from the lungs is directed to the left side of the heart and then pumped to the entire body.
Reason (R): This arrangement, called double circulation, ensures that oxygenated and deoxygenated blood do not mix, providing an efficient oxygen supply to tissues.
Which of the following is correct?
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
- a Both A and R are true, and R is the correct explanation of A.
- b Both A and R are true, but R is NOT the correct explanation of A.
- c A is true but R is false.
- d A is false but R is true.