Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Pericidine A, an antibiotic block the overall process of Electron transport chain (ETC).
Reason (R) : It inhibit electron flow from complex-I to Ubiquinone in electron transport chain.
In light of the above statements, choose the correct answer from the options given below.