A={a,b,c,d,e,f,g} and
R={(a,a),(b,b),(c,d),(c,g),(d,g),(e,e),(f,f),(g,g)} be a relation on A
R is not reflexive as neither pair c,c not d,d is not here in R
R is not symmetric as c,d is there but d,c is not there in R
R is antisymmetric as if has no violation of property that if a,b in R and b,a in R then a=b
either if condition is false in R or both if then are true
hence option D is right ans