25. Which of the following statement(s) is cotrect regarding to protein endocytosis or cxocytosis?
 (1) Receptor-mediated endocytosis of ligands generally occurs through clathrin/AP2-coated vesicles.
(2) SARS-CoV-2 appears to infect cells by first binding viral spike proteins with host protein receptors. The virus is thenendocytosed into the host cells.
(3) Neurotransmitters are typically relcased from synaptic vesicles into the synaptic cleft via exocytosis
(A) 1 and 2
(B) 2 and 3
(C) I and 3
(D) 3 only
(E) All of above are correct.