<prompt> Inhibitor of Complex I of ETC-H2S2, 4 DNDRotenoneBAL  <response>: Ans. is c i.e., Rotenone Inhibitors of Electron transport chain Respiratory chaino Complex I:- Barbiturates amoborbital, piercidin A, rotenone, ehlorpromazine, guanithidine.o Complex II:- Carboxin, TTFA, malonate.o Complex III:- Dimercaprol, BAL, actinomycin A, Naphthyloquinone.o Complex IV cytochrome c oxidase Carbon monoxide CO, cyanide CN-, H2S, azide N3 