What is the main function of carbohydrates in our body?

I - The main function of carbohydrates is to provide energy to our body.
II - Carbohydrates are responsible for the formation of enzymes and hormones.
III - Carbohydrates are essential for blood clotting.
IV - Carbohydrates are part of the antibodies that defend our body.
V - Carbohydrates are a source of amino acids.
a) Only I and II are correct.
b) Only I, II and IV are correct.
c) Only I, II, III and IV are correct.
d) Only I, II, IV and V are correct.
e) All statements are correct.