Correct answer: (c) 3 4 1 2
Explanation
- A
4 2 1 3
(a) 4 2 1 3. Puts Kuru at Potan and Asmak at Virat Nagar. Potan is Asmaka’s capital on the Godavari; Virat is Matsya, not Asmak.
- B
3 1 4 2
(b) 3 1 4 2. Gives Kuru to Mathura and Sursena to Indraprastha. Mathura is Surasena; Indraprastha is Kuru.
- C
3 4 1 2
(c) 3 4 1 2. Matsya → Virat Nagar (3), Kuru → Indraprastha (4), Sursena → Mathura (1), Asmak → Potan (2). That four-pair walk is the official key.
- D
2 3 4 1
(d) 2 3 4 1. Opens Matsya at Potan and ends Asmak at Indraprastha, swapping the Deccan and Kuru seats.
Summary. Official key is (c) 3 4 1 2. Matsya’s capital is Viratanagara (Jaipur belt), Kuru’s is Indraprastha, Surasena’s is Mathura, and Asmaka’s is Potana/Potali on the Godavari. Any code that parks Mathura on Kuru or Potan on Matsya fails. Only (c) keeps all four Mahajanapada–capital pairs.