GATE Mechanical Engineering (ME) 2019 Shift 1 Solved Paper

M and N are two persons
P, Q, R and S are children of M and N
X is the child of P and Y is the child of R
And it is also mentioned that Y is the legitimate child of W that means R and W are spouse
Now checking the statements one by one
Option A says W is the wife of R which is possible
Option C says M is the grandmother of Y which is also possible
Option D says R is the father of Y which is also possible
Option B says W is the wife of P which is the only statement which is not possible and necessarily false