Ramona purchased an antibody which showed "Goat anti GFAP" on its catalog. She used the "Donkey serum" to block, preventing non-specific binding of antibodies or other reagents to the tissue. Which of the following can be used as the secondary?
a. Donkey anti-Goat with wavelength 488nm Alexa Fluor
b. Donkey anti-Rabbit with wavelength 488nm Alexa Fluor
c. Goat anti-Donkey with wavelength 488nm Alexa Fluor
d. Goat anti-Goat with wavelength 488nm Alexa Fluor