What are the functions of the skin? I- Formation of a protective barrier against invasive agents. II- Protection of the immune system. III- Therma...

What are the functions of the skin?

I- Formation of a protective barrier against invasive agents.
II- Protection of the immune system.
III- Thermal regulation.
IV- Sensitivity and protection against external aggressions.
V- Protection against water and nutrient loss.
a) Only I, II and III are correct.
b) Only II, III and IV are correct.
c) Only I, IV and V are correct.
d) All statements are correct.