The regulator also approved transactions involving Prosus-backed Navi, Aditya Birla Renewables' acquisition of Solenergi Power and Adani Energy Solutions' purchase of IntelliSmart Infrastructure. The Competition Commission of India (CCI) on Friday approved four major corporate transactions, headlined by French telecom billionaire Xavier Niel's 5.1 billion euro acquisition of a 16.2 per cent stake in UK-based telecommunications major Vodafone Group PLC.