The expected answers were:

 

 

 

 

 

 

 

2-tuned circuits, 2 feedback circuit; 2 amplifier circuit

(b)        -           R1, R2 and R3 provide d.c. bias for the establishment of transistor
                        operating point.
            -           C2 and C3 are by-pass capacitors
            -           C3 and R3 combine to stabilize Q-point
            -           L1 and C1 constitute the frequency-determining circuit
                                                                                                                                    255
The question was on oscillators, multivibrators and logic gates.  It was attempted by quite a few candidates.  The performance was not encouraging.