The correct option is D none of these
Given : R={(a,b):a is the father of b}
(i) (a,a)∉R as a can not be father of a.
So, R is not reflexive.
(ii) Now if aRb is true, then a is the father of b.
⇒(b,a)∉R as b cannot be father of a.
So, R is not symmetric.
(iii) Let (a,b)∈R and (b,c)∈R
Hence, a is father of b and b is father of c.
⇒(a,c)∉R as a is not the father of c.
So, R is not transitive.