Anemia is caused by the deficiency of $........$.

Deficiency of which vitamin causes convulsions?

The deficiency of vitamin $x$ causes beri beri and deficiency of vitamin $y$ causes convulsions. What are $x$ and $y$ respectively?

Which of the following vitamins is not soluble in water?

Which of the following $B$-complex vitamins is stored in our body?

What is the chemical name of vitamin $B_1$?