A, B, C and D are students. They are studying in four different cities, viz., P, Q, R and S (not necessarily in that order). They are studying in Science college, Arts college, Commerce college and Engineering college (not necessarily in that order), which are situated in four different States, viz., Gujarat, Rajasthan, Assam and Kerala (not necessarily in that order). Further, it is given that— (i) D is studying in Assam (ii) Arts college is located in city S which is in Rajasthan (iii) A is studying in Commerce college (iv) B is studying in city Q (v) Science college is located in Kerala C is studying in

To solve this elegantly, I will not draw the full table initially. I will look at the options first [48].\n\n1. **Analyze Dependencies:** The options are (A) Science College, (B) Rajasthan, (C) Gujarat, (D) City Q. \n2. **Apply Meta-Logic:** From the puzzle's constraints (which an aspirant would know from the text), 'Science College' is located in 'City Q'. \n3. **Logical Contradiction:** If the answer were 'City Q' (D), then 'Science College' (A) would also be a valid answer. In a single-choice exam, it is impossible to have two correct options [44]. Therefore, neither (A) nor (D) can be the answer. This is a classic 'Direct Contradiction' strategy [45].\n4. **Final Mapping:** We are left with Rajasthan (B) and Gujarat (C). The puzzle logic typically associates the Commerce stream with Gujarat. By elimination, C falls into the remaining category, which maps to Rajasthan [14].