This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Physiology
The process by which fusion of part of a cell membrane occurs is/are 
Select and explain. 
A. Cell division, B. Endocytosis, C. Exocytosis, D. Virus replication
B: Endocytosis
Answer: B: Endocytosis 
Explanation: Ans. (b) EndocytosisEndocytosis is the process of taking contents inside the cell. It involves fusion of two cell membranesExocytosis is release of contents from inside of the cell to outside. It involves fusion of vesicles inside the cell to its cell membrane