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What is the total voltage gain of the nth stage in an n-stage cascading amplifier?

(a) AVK = AIK × RLK × RiK

(b) AVK = AIK × RiK / RLK

(c) AVK = AIK / RLK × RiK

(d) AVK = AIK × RLK / RiK

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The doubt is from N-Stage Cascading Amplifiers topic in section Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

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Right option is (d) AVK = AIK × RLK / RiK

Best explanation: The gain for any intermediate stage in an n-stage cascading amplifier can be calculated using AVK = AIK × RLK / RiK. Where, AIK, RLK and RiK is the estimated with respect to the values of the previous stages. AIK represents the voltage gain while RLK and RiK represent the effective load impedance.

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