Answer;
12 (per 1000 people)
Explanation;
Birth rate in India in 2011 = 21 (per 1000 people)
Death rate in India in 2011 = 9 (per 1000 people)
Growth rate = Birth rate - Death rate
21(per 1000 people) - 9 (per 1000 people)= 12(per 1000 people)
This means there will be a growth rate with a magnitude of 12 per 1000 people.