Correct : a

The correct answer is Option A — P = Thirst; Q = Hunger.
This is a word analogy question asking us to identify the consistent relationship between Water and P, and between Food and Q. The analogy reads: Water is to P as Food is to Q.
The correct relationship is "substance : the biological craving or need for that substance." Thirst is the body''s need for water, and Hunger is the body''s need for food. Both pairs follow the exact same logical pattern, making the analogy complete and parallel.
Option A — P = Thirst, Q = Hunger: Water : Thirst and Food : Hunger — both are "substance : craving for that substance." The relationship is identical across both pairs. Correct.
Option B — P = Drink, Q = Hunger: "Drink" is an action performed with water, while "Hunger" is a craving. The relationship types are inconsistent across the two pairs — one is an action, the other a physiological state. Incorrect.
Option C — P = Thirst, Q = Satiated: "Thirst" is a craving that exists before consuming water, while "Satiated" is the state of fullness that exists after consuming food. The directions of the relationship are opposite, breaking the parallel. Incorrect.
Option D — P = Wet, Q = Critic: "Wet" is a property caused by water contact, and "Critic" has no meaningful relationship with food in this context. Both words are unrelated to each other in any consistent way. Incorrect.
The key to analogy questions is ensuring the same type of relationship holds for both pairs — here, "need/craving for" is the consistent link throughout.