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Rajesh's brother's only son means Rajesh's nephew. The mother of Rajesh's nephew is Rajesh's brother's wife, making her Rajesh's sister-in-law.

A is father of B, D is brother of B, C is daughter of B. So D is the brother of C's father, making D an uncle to C.

Each letter is coded by its position in alphabet. L=12, O=15, G=7, I=9, C=3.

A is 3rd from left, so B is at position 3+5=8. From right, 8th position = 1st from right. Wait, recalculating: A at 3rd, B at 8th from left means B is at 8-8+1=1st from right. Actually 9-8=1st from right.

Person A has attribute 1 (count: 1). B doesn't have it (count: 1). C and D both have it (count: 1 + 2 = 3). Total: 3 people have attribute 1.

FLOWER and BLOSSOM are synonyms (both mean to bloom/flourish). DARK and NIGHT are conceptually linked similarly (night is characterized by darkness, as blossom characterizes flower).

Professors ⊂ Knowledgeable. Some knowledgeable people are not teachers. Therefore, some of those non-teachers in the knowledgeable group could be professors. A must be true.

Order: Devi < Arjun < Bhavna < Chaya. Chaya finishes last.

121=11², 144=12², 169=13², 196=14², 225=15². These are consecutive perfect squares. 289=17², which breaks the consecutive sequence. 289 is the odd one.

From the statements: Some novels are thrilling → Some thrillers are entertaining (since all thrillers are entertaining) → Not boring. So some novels are not boring. Statement C (All novels are boring) is definitely FALSE.