Correct answer: a base
Explanation:
An antacid is a substance that is used to neutralize excess acid in the stomach. Since it neutralizes acid, it must be a base.
Common antacids include:
- Magnesium hydroxide \(\text{Mg(OH)}_2\)
- Aluminium hydroxide \(\text{Al(OH)}_3 \)
- Sodium bicarbonate \( \text{NaHCO}_3 \)
Hence, the correct answer is: a base.
Match the amino acid given in List-I with their one-letter code given in List-II
\[ \begin{array}{|l|l|} \hline \textbf{Name of amino acid} & \textbf{One-letter code} \\ \hline (A) \; \text{Lysine} & (I) \; W \\ \hline (B) \; \text{Tryptophan} & (II) \; Q \\ \hline (C) \; \text{Tyrosine} & (III) \; K \\ \hline (D) \; \text{Glutamine} & (IV) \; Y \\ \hline \end{array} \]