Question

The relation 'is the father of' is________.

a) reflexive b) irreflexive

c) transitive d) symmetric

Answer 1

It is not symmetric because A is father of B=>B is son of A or B is a daughter of A,

it is not transitive because A is father of B, B is father of C=> A is grandfather of C.

Answer is b) irreflexive because A is not father of A.