The Richest Source of "X" Is Wheat Germ Oil $\alpha$ -Tocopherol Is the Active Compound Present in It

Multiple Choice

The richest source of "X" is wheat germ oil. "X" is also found in fish oil and leafy green vegetables. It is fat-soluble, and $\alpha$ -tocopherol is the active compound present in it. It was first identified in 1922 as a dietary factor essential for reproduction in rats. Identify "X".

A) Vitamin B
B) Vitamin E
C) Thiamine
D) Riboflavin