During synaptic transmission of nerve impulse, neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.

Question

$\begin{array}{1 1} \text{a.P=Acetyl choline $\; \; \;$Q=Ca 2+} \\ \text{b. P=Acetylcholine $\; \; \;$ Q=Na +} \\ \text{c. P=GABA $\; \; \; \; \; \; \; \; \; \; \; \;$ Q=Na +} \\ \text{d. P=Cholinesterase$\; \; \;$ Q=Ca 2+} \end{array}$