<prompt> Example of physiological atrophy is-Decrease in uterus size after deliveryDisuse atrophyAtrophy of a muscle after nerve damageSenile atrophy  <response>: Ans. is a i.e., Decrease in uterus size after delivery Atrophy Atrophy is the reduced size of an organ or tissue resulting from a decrease in cell size and number. Atrophy may be physiological atrophy of notochord and thyroglossal duct during fetal development; decrease in uterus size after delivery; or pathological e.g. disuse atrophy, denervation atrophy, senile atrophy etc. 