Which of the following statements are correct for the transmission electron microscope?
I. Electron beam passess through the speciment and an electromagnetic objective lens which magnifies the image.
II. A single electron beam is used throughout for the production of a magnifying image.
III. This microscope is especially useful in studying the surface structures of intact cells and viruses.
IV. A living intact specimen can be used for viewing.
A. Only III
B. I and II
C. II and III
D. III and IV
