Consider the following processes which are preparatory to cell division during interphase and choose the correct answer:
1. Replication of DNA takes place
2. The centrioles divide, forming a pair of new centrioles
3. Synthesis of energy-rich compounds which provide energy for mitosis
4. Synthesis of proteins which are later found in the spindle

A. Only 1 is true

B. Only 1 and 2 are true

C. Only 2 and 4 are true

D. 1, 2, 3 and 4 are true

Answer: Option D