Ramada, 69, an avid golfer and fitness enthusiast, recently got a comprehensive health exam done, and her physician remarked that her vital organs were in such good shape that her age was about 10 years less than her chronological age. a) social
b) mental
c) biological
d) psychological

C. Biological.

Explanation:

Her biological age is younger because of the healthiness her organs have. Since that the physician remarked that her vital organs were in really good shape. (Organs = Biology)

Therefore, when people have a really good health, their chronological age (number age), it's not according to their healthiness. Some people are younger or older than their actual age.