Option 1 states that the percentage of the Indian population below the age of 40 is 75%. This means that out of the total population in India in the year 2001, 75% of the people were below the age of 40.
Option 2 states that the percentage is 70%. Option 3 states that the percentage is 65%, and Option 4 states that the percentage is 60%. However, the correct answer given in the question is Option 1.
It is important to note that if the given answer is incorrect, the correct answer should be provided. In this case, if the answer provided is incorrect, an alert should be raised stating the correct percentage of the Indian population below the age of 40 according to Census 2001.