Question

coca cola and fanta in seventies to thumps and campa cola in eighties to pepsi and coke in nineties

Answer 1

During the 1970s the government observed that a lot of foreign currency was going out of the country due to soft drinks. Also a lot of profit from Indian market was going out of the country. So the government canceled their licenses to sell them in India.
So Thumbs up and Campa cola came up in India.

Due to globalization policies to globalize Indian market, the foreign companies were allowed in India to establish joint ventures.