Choose the correct alternative from the following :
Assertion (A) : The freezing of sea water during winter does not kill the fishes.
Reason (R) : Only surface water is frozen.
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.
E. Both A and R are false
Answer: A . Both A and R are true and R is the correct explanation of A.
In winter, only the surface water of the sea freezes.
Further below, water does not freeze because the surface ice provides an insulating coat.