Arrange the Following Events in Protein Secretion in the Proper

Multiple Choice

Arrange the following events in protein secretion in the proper sequence.
1) The polypeptide chain enters the lumen of the endoplasmic reticulum.
2) A secretory vesicle is formed.
3) A transport vesicle is formed.
4) The polypeptide chain enters the lumen of the Golgi complex.

A) 1, 2, 3, 4
B) 1, 3, 2, 4
C) 1, 3, 4, 2
D) 4, 3, 1, 2
E) 3, 1, 4, 2