M N O P Q and R are two sets of triplets not necessarily in the order given i No...........

Logical Reasoning(SBI-PO) Blood Relation

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M, N, O, P, Q and R are two sets of triplets, not necessarily in the order given.

(i) None of the six is married to a sibling or to some one of the same sex.

(ii) Four of the six are males and two are females

(iii) Neither set of triplets contains three sibling of the same sex.

(iv) N and P are married to each other

(v) M is Q’s only brother

Which of the following statements must be false?

O is P’s sister-in-law

Q is P’s sister-in-law

N is P’s brother-in-law

O is P’s brother-in-law

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Explanation:

On the basis of information (iii) and (IV), it is confirmed that each group of three triplets will consist of two males and one female each. Since M is married to P, they belong to different groups and since N is Q’s only brother, they belong to the same group. And hence we get two possible sets of groups
M P M P
N (Male) O N (Male)
Q R R Q
2 Males 2 Males 2 Males 2 Males
1 Female 1 Female 1 Female 1 Female
A B
If Q is P’s sister-in -law then set A would be an acceptable set. Q is a female (being P’s sister-in- law), N a male (being Q’s only brother). As the given conditions in a group, there would be 2 males and 1 female. therefore,
M will be a n:ale but M can’. be male because N is Q’s only brother and therefore, M has to be a female. Since
there arises a contradiction,