Question

question 19 the of the microscope carries three or four objective lenses. a base b arm c nosepiece d ocular

Explanation:

The nosepiece of a microscope is the part that holds and allows rotation of three or four objective lenses, enabling different magnifications. The base supports the microscope, the arm is for carrying and connects parts, and the ocular is the eyepiece.

Answer:

C. nosepiece