Questions & Answers of Frequency response of amplifiers

Which one of the following statements is correct about an ac-coupled common-emitter amplifier operating in the mid-band region?

The ac schematic of an NMOS common-source stage is shown in the figure below, where part of the biasing circuits has been omitted for simplicity. For the n -channel MOSFET M, the transconductance gm = 1 mA/V, and body effect and channel length modulation effect are to be neglected. The lower cutoff frequency in Hz of the circuit is approximately at