The company posted a 16.1 per cent rise in revenue from operations in the third quarter.Power producer NTPC posted a 1 per cent rise in December-quarter profit on Wednesday, missing estimate, as higher expenses weighed.Third-quarter profit after tax from continuing operations came in at Rs 2,385 crore ($335.16 million), marginally higher from Rs 2,361 crore a year earlier, the state-owned company said.Analysts on average expected the New Delhi-headquartered company to clock in a profit of Rs 2,619 crore, according to Thomson Reuters Refinitive data.The company posted a 16.1 per cent rise in revenue from operations in the third quarter.