Concept:
Vitamins are essential organic compounds required in small quantities for normal body functioning. They are divided into:
• Water-soluble vitamins
• Fat-soluble vitamins
Step 1: Matching water soluble vitamin not easily excreted.
Most water-soluble vitamins are excreted quickly through urine. However, Vitamin \(B_{12}\) is stored in the liver for long durations.
Hence:
\[
A \rightarrow Y
\]
Step 2: Matching vitamin preventing cheilosis.
Cheilosis is cracking at corners of mouth caused by deficiency of Riboflavin.
Riboflavin \(= B_2\)
Thus:
\[
B \rightarrow W
\]
Step 3: Matching fat-soluble vitamin.
Fat-soluble vitamins are A, D, E and K.
Among given options, only Vitamin E is fat soluble.
Hence:
\[
C \rightarrow Z
\]
Step 4: Matching vitamin preventing seizures.
Vitamin \(B_6\) deficiency can lead to convulsions and nervous disorders.
Therefore:
\[
D \rightarrow X
\]
Thus the correct matching is:
\[
A-Y,\ B-W,\ C-Z,\ D-X
\]