At the age of 20 years, the number of bones in the human body is approximately-

Correct answer: (b) 200

Explanation

By the age of 20 the skeleton is fully formed, with 206 bones: 80 in the axial skeleton and 126 in the appendicular skeleton.

Of the options, 200 is the nearest. (A newborn has about 300 separate bones, which fuse as it grows.)

Some keys give (d) None of these, reading the adult total of 206 as not "approximately 200".