Answer: Option A) carbohydrates and lipids
Explanation:
Myelin is present in the axons of nerve cells. It is composed of a class of lipids called sphingolipids with choline, galactose, glucose present in the chemical composition alongside N-acylsphingosine.
Thus, Myelin is composed of lipids and carbohydrates
The answer is limiting factors.
I hope this helped you!