Match the class of compounds given in Column-$I$ with their functions given in Column-$II$.
Column-$I$ Column-$II$ $A$. Antagonists $1$. Communicate message between two neurons and that between neurons to muscles $B$. Agonists $2$. Bind to the receptor site and inhibit its natural function $C$. Chemical messenger $3$. Crucial to body's communication process $D$. Inhibitors $4$. Mimic the natural messenger $E$. Receptors $5$. Inhibit activities of enzymes
| Column-$I$ | Column-$II$ |
| $A$. Antagonists | $1$. Communicate message between two neurons and that between neurons to muscles |
| $B$. Agonists | $2$. Bind to the receptor site and inhibit its natural function |
| $C$. Chemical messenger | $3$. Crucial to body's communication process |
| $D$. Inhibitors | $4$. Mimic the natural messenger |
| $E$. Receptors | $5$. Inhibit activities of enzymes |
(A-2, B-4, C-1, D-5, E-3) $A \rightarrow 2$ (Antagonists bind to the receptor site and inhibit its natural function).
$B \rightarrow 4$ (Agonists mimic the natural messenger).
$C \rightarrow 1$ (Chemical messengers communicate messages between neurons or between neurons and muscles).
$D \rightarrow 5$ (Inhibitors inhibit the activities of enzymes).
$E \rightarrow 3$ (Receptors are crucial to the body's communication process).
$B \rightarrow 4$ (Agonists mimic the natural messenger).
$C \rightarrow 1$ (Chemical messengers communicate messages between neurons or between neurons and muscles).
$D \rightarrow 5$ (Inhibitors inhibit the activities of enzymes).
$E \rightarrow 3$ (Receptors are crucial to the body's communication process).
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