The expected answers were:
(a)        Any two advantages
            -           Gain stabilization
            -           Reduction of distortion
            -           Enhancement of bandwidth
            -           Reduction of noise

(b)        The circuit diagram is conventionally referred to as the “inverting amplifier”.

(c)        The functions of the circuit elements are as follows:
            -           Ri serves as input resistance and forms part of the feedback network.
            -           A amplifies the input signal
            -           Rf essentially provides the feedback signal

This question was on amplifiers.  The question was popular.  Many candidates that answered this question did well in it.