Pattern: 3×1=3, 3×4=12, 3×9=27, 3×16=48, 3×25=75, 3×36=108. Multiply 3 by perfect squares.

Each letter is shifted backward by 1 position in the alphabet. S→R, C→B, I→H, E→D, N→M, C→B, E→D. The pattern gives RDHNCBD.

Since some vertebrates are aquatic and no aquatic animals are terrestrial, some vertebrates (aquatic ones) are not terrestrial. Mammals are vertebrates, so some mammals may not be terrestrial.

T→G (reverse), E→2, L→O (reverse), E→2, P→K (reverse), H→S (reverse), O→4, N→M (reverse), E→2. Gives: G2O2KS4M2. Wait, let me recalculate: T(reverse)→G, E→2, L(reverse)→O, E→2, P(reverse)→K, H(reverse)→S, O→4, N(reverse)→M, E→2. Check option more carefully - answer is C.

In a circle of 6: A opposite D means 3 positions apart. If B is right of A, and counting clockwise: A, B, ?, ?, ?, ?. D is opposite A. The person left of D (right side from D's perspective) is C.

Odd numbers: 1, 3, 5 (A could have any). Prime numbers: 2, 3, 5 (B could have any). Divisible by 2: 2, 4 (C could have any). Multiple assignments possible.

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.

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.

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).

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.