The correct option is D Increased activity of sweat and oil glands
Following changes take place in the body at puberty:
∙ Different body parts might grow at the different rates. It will seem out of proportion. Eventually with time after a certain period, every part gets nourished and develops.
∙ Muscle development is more prominant in boys compared to that of girls.
∙ Boys sometimes develop a horse voice for a little while but they eventually develop a deep voice while girls develop a very high pitched voice right away.
∙ Increased activity of sweat glands, salivary glands and oil glands is observed. Due to these secretions, acne and pimples develop.