Answer:
The correct answer is - a, and b.
Step-by-step explanation:
Plasticity is the ability of the change in the brain during course of life span. It is a remarkable ability to recovery after the surgery or removal of the part of the brain or injury to the brain.
The neurogenesis is the ability to the regeneration of the nervous system cell, it can occur in the adulthood as well however it takes approximately six week time.
Thus, the correct answer is - a, and b.