Choose the wrong statement:Negative feedback is required to design an oscillator circuitVoltage gain of BJT amplifier is almost constant at mid-band frequencyBJT is worked as an amplifier only in active regionVoltage divider bias circuit is most stable biasing circuit

The wrong statement is: "Negative feedback is required to design an oscillator circuit".

In fact, positive feedback is required to design an oscillator circuit. Oscillators are circuits that generate a continuous voltage output waveform at a required frequency with the help of the feedback signal. The feedback signal of the oscillator is phase-shifted by an amount of 180° or 360° in phase with the input signal. This is achieved by using positive feedback. Negative feedback is used to stabilize the operational amplifier and to avoid distortion in the amplifier.