Concept:
- When every option is a full set of four pairs, testing one certain pair at a time knocks out wrong options faster than building the whole answer from scratch.
- The pair a is the one almost every student is sure about, so it becomes the first filter.
Step 1: Use pair a as the first filter.
Vande Mataram was written by Bankim Chandra Chattopadhyay, which is item iv.
Options (C) and (D) both read a-iii, so both are wrong straight away.
Step 2: Compare the two options still standing.
(A) reads a-iv, b-iii, c-ii, d-i and (B) reads a-iv, b-iii, c-i, d-ii. They agree on a and b, so only c and d decide the answer.
Step 3: Test pair c, Bardoli Satyagraha.
Option (A) links Bardoli with Dr. B.R. Ambedkar, and option (B) links it with Sardar Vallabhbhai Patel. Bardoli in 1928 was a no-revenue campaign of Gujarati peasants led by Patel, which is why he came to be called Sardar. Option (A) therefore fails.
Step 4: Cross-check with pair d.
The Poona Pact of 1932 dealt with reserved seats for the depressed classes and was signed by Dr. B.R. Ambedkar with Gandhiji. Option (B) links d with Ambedkar, which agrees.
Final Answer: (B) a-iv, b-iii, c-i, d-ii