Indira Gandhi (Nehru's daughter) witnessed all of the following during her tenure as prime minister EXCEPT a advances in economic productivity. b ethnic unity. c forced sterilizations to curb population. d an attack on the Sikh golden temple in Amritsar. e the defeat of Pakistan in the 1971 war.
She was the prime minister in 1971, so e is true. Also the attack on the Golden Temple was a major problem of her governance, so d is true as well. Also a and c are true, so I think that the best answer s b. ethnic unity.