The correct answer is option 3 - 32 years.

In statistics, the median is the middle value of a set of numbers when they are arranged in ascending order. Therefore, the median age of the Indian population is 32 years.

Option 1 - 25 years: This is not the correct answer because it is lower than the median age of 32 years.

Option 2 - 29 years: This is also not the correct answer because it is lower than the median age of 32 years.

Option 3 - 32 years: This is the correct answer as it matches the median age of the Indian population, which is 32 years.

Option 4 - 35 years: This is not the correct answer because it is higher than the median age of 32 years.

To recap, the median age of the Indian population is approximately 32 years, making option 3 the correct answer.