What is the role of electrolytes in the body?

I- Electrolytes are responsible for transmitting electrical signals in the body.
II- Electrolytes participate in muscle contraction.
III- Electrolytes are not involved in blood clotting.
IV- Electrolytes have no role in osmotic balance.
a) Only I and II are correct.
b) Only II and III are correct.
c) Only I, II, and IV are correct.
d) Only III is correct.
e) All statements are correct.