<prompt> An adverse effect of neuroleptic drugs is directly correlated positively to the antipsychotic potency of the different compounds. Which of the following is it?SedationExtrapyramidal motor disturbancesPostural hypotensionLowering of seizure threshold  <response>: Ref: KDT 6e p426, 431 Antipsychotic potency of typical antipsychotic drugs is related to their D2 receptor blocking action. D2 blocking action is also responsible for extrapyramidal adverse effects like muscle dystonia and Parkinsonism etc. 