Direction: Spot the grammatical errors in the given sentence. Mark the part with error as your answer. If there is no error, mark "No error" as the answer. (Ignore punctuation error)

The government has warned (a)/ that air pollution from vehicles and power stations (b)/ is reducing life expectancy in the country (c)/ in an average of 6 months (d)/ No error (e)

[INDIAN BANK(PO), 2011]