The answer is 'D'. Want explanation ?
Answer:
Replacement and regeneration of new cells- Regeneration and replacement of worn-out and damaged tissues is a very important function of mitosis in living organisms. Mitosis helps in the production of identical copies of cells and thus helps in repairing the damaged tissue or replacing the worn-out cells.
This would definitely be FALSE. Being able to distinguish the subjects and objects will help you to avoid confusion on which verb or pronoun to use. We always follow the rules in subject-verb agreement as well as the pronoun-antecedent rules. Knowing either the subject is plural or singular will give you an idea on what verb to use. Same goes with the antecedents and pronouns to use.