The correct answer is A. Madhuri Dixit.
Madhuri Dixit is an Indian actress, dancer, and playback singer. She is known for her work in Hindi films. She has won numerous awards, including five Filmfare Awards. She was appointed as the brand ambassador of the Nirmal Bharat Abhiyan in 2014.
Vidya Balan is an Indian actress. She is known for her work in Hindi films. She has won numerous awards, including two Filmfare Awards. She was not appointed as the brand ambassador of the Nirmal Bharat Abhiyan.
Priyanka Chopra is an Indian actress, singer, and film producer. She is known for her work in Hindi films. She has won numerous awards, including five Filmfare Awards. She was not appointed as the brand ambassador of the Nirmal Bharat Abhiyan.
Parineeti Chopra is an Indian actress. She is known for her work in Hindi films. She has won numerous awards, including two Filmfare Awards. She was not appointed as the brand ambassador of the Nirmal Bharat Abhiyan.
The Nirmal Bharat Abhiyan is a cleanliness campaign launched by the Government of India in 2014. The campaign aims to make India a clean and hygienic country. The campaign has been endorsed by several celebrities, including Madhuri Dixit.