Solution:(d) Thousands of people were airlifted from Ukraine by the Indian army. (Correct)(a) Thousands of people had been airlifted from Ukraine by the Indian army. (Incorrect Tense)
(b) Thousands of people have been airlifted from Ukraine by the
Indian army. (Incorrect Tense)
(c) Thousands of people are airlifted from Ukraine by the Indian army. (Incorrect Tense)