Question

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Freshwater fishes produce a large amount of diluted urine
Reason (R): Skin has low permeability to the water and salt ions
In light of the above statements, choose the correct answer from the options given below.

• 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.

Hint:

The primary osmotic water entry occurs through the highly permeable gill epithelium, not the skin. The skin's relative impermeability is a protective adaptation but does not drive urine dilution.

Answer 1

The Correct Option is B