The correct option is option 2, which states that statement 2 is correct. Let`s analyze each statement to understand why.

Statement 1: "Adolescent population comprises half the population of the country."

This statement is incorrect. According to the 2011 Census, the adolescent population comprises around 21% of the total population of the country, not half.

Statement 2: "The group is regarded as youthful population with high potential."

This statement is correct. Adolescents are considered a youthful population with high potential as they are in a phase of transition from childhood to adulthood. They have the potential to contribute to the development of the country.

Statement 3: "In this group, there are a greater number of females than males."

This statement is not mentioned in the question, so it cannot be deemed correct or incorrect based on the information provided.

To summarize, statement 2 is the only correct statement as per the information given.