Read the statements given below.
a. Clonal members of a population exhibit low adaptability
b. After initial supply of yolk has been exhausted,growing individuals such as amphibian tadpole must seek its food from surrounding water
c. All mammals retain the developing young one in their body for a much longer time period for protection and nourishment
d. Life expectancy, a characteristic feature of a species is nearly 67 for humans according to recent survey conducted in India Choose the correct option.

Options

A. a & b are correct
B. c&d are correct
C. a, b and d are incorrect
D. Only d is incorrect