A virologist who studies viruses in great detail which of the following would he use?
a) Compound microscope
b) Porcelain filters
c) Electron microscope
d) CT Scan machine

Answer:
The correct option is (c) Electron microscope.

Explanation:
A virologist who studies viruses in great detail would use an electron microscope. This is because viruses are much smaller than bacteria and cannot be seen with a light microscope. An electron microscope uses beams of electrons to produce images of viruses and other small particles at a much higher magnification than a light microscope.