d
\(\text { Here, } R_{0}=800 \Omega, R_{i}=192 \Omega\)

current gain, \(\beta=0.96\)

Voltage gain \(=\) Current gain \(\times\) Resistance gain

                         \(=0.96 \times \frac{800}{192}=4\)

Power gain \(=\) [Current gain ] \(\times\) [ Voltage gain ]

                  \(=0.96 \times 4=3.84\)