i)once if you are travelling from classA,B,C . the efficiency increases from 50%,78,100%.
ii)also its linearity decreases from class A to C.ie class A is more linear than B which is more linear than Class C
iii) CLASS A wll have operating point at Qpoint but for class B it goes near to cutoff.class C goes into deeper cutoff..
iv)class B is having crossover distortion to mitigate Class AB was proposed.
v)cLASS A will have zero signal high power dissipation ie no signal at its input high power dissipation...whereas class B will power dissipation only when it is having signal in its input
still to be explored