What is the function of cytochrome c in the electron transport chain?

a. It transports an electron from complex III to complex IV.
b. It oxidizes NADH to NAD+.
c. It reduces two molecules of Q to QH2.
d. It transports two electrons from NADH or FADH2 to complex III.
e. It oxidizes FADH2 to FAD.

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  the volume of  0.220 m k2s    solution  required  to  completely  react with 175 ml  of 0.115m co(no3)2  calculate the moles  of co(no3)2 =  molarity x volume/1000175 x0.115/1000= 0.02  moleswrite  the reacting  equationk2s(aq)  +  co(no3)2  = 2 kno3(aq)  + cos(s)by  use  of mole ratio between k2s to co(no3)2 which  is  1: 1 the moles of k2s is therefore = 175  x0.115/1000= 0.02  molesvolume = moles/molarity=0.02/0.22=0.09  ml  of k2s