An amplifier using an opamp with slew rate SR=1v/µsec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed

A. 795mV

B. 395mV

C. 79.5 mV

D. 39.5mV

Answer: Option C