A
1 2 4 3
B
2 3 1 4
C
3 1 4 2
D
4 3 2 1
Correct answer: (b) 2 3 1 4
Explanation
- A
1 2 4 3
(a) 1 2 4 3. Gives Pabna the Santhal dates (1855–56). Pabna is the 1870s–80s agrarian league, not the Santhal hul.
- B
2 3 1 4
(b) 2 3 1 4. Pabna 1873–85; Eka 1921–22 (Awadh); Santhal 1855–56; Tana Bhagat 1914 (Oraon, Chhotanagpur). That map is the official key.
- C
3 1 4 2
(c) 3 1 4 2. Parks Pabna in 1922 and Santhal in 1914—both centuries out.
- D
4 3 2 1
(d) 4 3 2 1. Sends Pabna to 1914 and Santhal to 1873–85.
Summary. Official key is (b) 2 3 1 4. Pabna agrarian (1873–85), Eka (1922), Santhal hul (1855–56), Tana Bhagat (1914). Do not give Pabna the Santhal decade. Honour the stored letter (b).