A transistor is used as an amplifier in CB mode with a load resistance of 5 k $\mathrm{\Omega }$ the current gain of amplifier is 0.98 and the input resistance is 70 $\mathrm{\Omega }$ , the voltage gain and power gain respectively are
(a) 70, 68.6                          (b) 80, 75.6
(c) 60, 66.6                          (d) 90, 96.6

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