(A]: The relationship between sucker fish and shark is considered to be an example of parasitism.
[R]: Sucker fish gets food and shelter from shark and also alters the population growth of the shark
A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false