Below a sentence is given which is divided into 4 segments. Identify the segment of the sentence which contains the grammatical error. If there is no error, mark 'No error' as your answer.

Five thousand rupees were a large amount seventy years ago.(A) A kilo of pulses could have been (B) bought for Rs 3 in the 1950's. The inflation (C) figures in those days were not very high.(D)