Concept:The members of a set are all the elements written inside the circle that represents it.Solution:Circle Q is the inner circle. The elements inside it are c, d and e.So Q={c,d,e} and n(Q)=3.Key point:8 is the number of members of the universal set U={a,b,c,d,e,f,g,h}, not of Q. Set P has 5 members (a,b,c,d,e). The stored key gave 8, which is wrong.Answer:Option B (3)
