A Tissue Section Is Fixed to a Microscope Slide,then Incubated

Multiple Choice

A tissue section is fixed to a microscope slide,then incubated with a fluorescently labeled antibody that binds to an antigen expressed by cells in that tissue.The preparation is then washed and inspected with a fluorescent microscope.This technique is called:

A) direct immunofluorescence.
B) indirect immunofluorescence.
C) fluorescence polarization.
D) autofluorescence.