Reliance Foundation Chairperson Nita Ambani on Saturday took up PM Narendra Modi's 'Clean India' challenge joining a cleanliness drive in Mumbai with Maharashtra governor CH Vidyasagar Rao. Nita Ambani is one of the nine "goodwill ambassadors" of the 'Swachh Bharat Abhiyan'. Earlier, Anil Ambani and Sachin Tendulkar had taken up the challenge and were seen cleaning different parts of Mumbai.