Multiple choice Why many adolescents get acne and pimples at the time of puberty? Because of irregular sex hormones Because of development of secondary sex organs Because of reproductive maturity Because of increased activity of sebaceous and sweat glands Reveal answer Fill a bubble to check yourself D Correct answer Explanation The reason why many adolescents get acne and pimples at the time of puberty is because of increased activity of sebaceous or oil and sweat glands.