In Which Technique Is Radioactivity Detected by Mixing the Sample

Multiple Choice

In which technique is radioactivity detected by mixing the sample in a vial with a special fluid that contains compounds that emit light if struck by a beta particle? The amount of light emitted in the fluid is a measure of the amount of radioactivity in sample.

A) autoradiography
B) an NMR machine
C) liquid scintillation spectrometry
D) mass spectrometry
E) AFM