Scented basmati rice is the contribution of

1. Dr.Borlaug
2. Dr.B.P.Paul
3. Dr.M.S.Swaminathan
4. Dr.A.K.Singh

The correct option is 3.
The areas of basmati rice production in India are in the states of Punjab, Haryana, Rajasthan, Jammu & Kashmir, Himachal Pradesh, Delhi, Uttarakhand, Uttar Pradesh and Bihar. India's total basmati production for the 2011/12 crop year that ended June was 5 million tonnes. In Pakistan, 95% of the basmati rice cultivation takes place in the province of Punjab, where total production was 2.47 million tonnes in 2010. In India, Haryana is the major basmati rice cultivating state, producing more than 60% of the total basmati rice produced in India.