New Delhi, Dec. 2 -- The Indian government cleared Pakistan's request for use of Indian airspace to ferry humanitarian aid to cyclone-hit Sri Lanka within four hours on Monday, people familiar with the matter said, rubbishing reports from Islamabad that New Delhi refused to grant overflight. The official request from Pakistan for overflight was submitted to the Indian side at 1 pm IST on Monday, seeking permission to fly through Indian airspace on the same day, the people said on condition of anonymity. "The request was processed at the shortest notice period of four hours," one of the people cited above said. "This gesture by India, despite the Pakistani side having banned the use of its airspace by Indian airlines, was done purely on huma...