Complex sentence: Reaching an impasse, the British proposed a second plan on 16 June 1946 to arrange for India to be divided into Hindu-majority India and a Muslim-majority India that would later be renamed Pakistan since Congress had vehemently rejected'parity' at the centre.
Split into simpler sentences: Reaching an impasse, the British proposed a second, alternative plan on 16 June 1946. This plan sought to arrange for India to be divided into Hindu-majority India and a Muslim-majority India that would later be renamed Pakistan, since Congress had vehemently rejected'parity' at the Centre.