Using alphabetic position: B=2, A=1, T=20.

The woman's mother's only daughter is the woman herself. So the man's mother is the woman. Therefore, the man is the woman's son.

P is father of both Q and S. S is Q's brother. T is spouse of S, making T the sister-in-law of Q.

Each letter is coded by its position in the alphabet (A=1, B=2, ... Z=26). M=13, A=1, C=3, H=8, I=9, N=14, E=5. Similarly, P=16, R=18, O=15, G=7, R=18, A=1, M=13.

Cat is a feline (scientific classification). Similarly, Horse is an equine. The relationship is animal to its scientific classification.

North 10 km, East 5 km (clockwise turn), then North 8 km more. Total: 18 km North, 5 km East

C is 2 seats left of B, A is 4 seats right of B. Order: C(leftmost), B, then A(rightmost)

Mohan is father of Priya, Priya is mother of Arjun and Neha. Therefore, Mohan is grandfather of Neha

Each letter is shifted by +1 position in alphabet. R→S, E→F, A→B, S→T, O→P, N→O

This follows valid deductive syllogism: Major premise → Minor premise → Conclusion