A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence inPassive/Active Voice.
The White Revolution in India, also known as Operation Flood.
It was a plan of three phases by the National Dairy Development Board to revitalise India's dairy production until India became self-sufficient in milk.
The program was so successful that by 1998, India was the world's largest milk producer.