According to the provisional figures of Census 2011, what percentage of population is below the age of 35 years in India ?

The correct answer is (b) 55%.

According to the provisional figures of Census 2011, the population of India is 1210.2 million. Out of this, the population below the age of 35 years is 662.5 million. This is 55% of the total population.

The other options are incorrect. Option (a) is incorrect because it is less than the actual percentage. Option (c) is incorrect because it is more than the actual percentage. Option (d) is incorrect because it is not a possible percentage.