Which one of the following statements is true about the small signal voltage gain of a MOSFET based single stage amplifier?

A transistor circuit is given below. The Zener diode breakdown voltage is $$5.3$$ $$V$$ as shown. Take base to emitter voltage drop to be $$0.6$$ V. The value of the current gain $$\beta $$ is ________.

In the given circuit, the silicon transistor has $$\beta $$ $$=75$$ and a collector voltage $${V_C} = 9\,V.$$ Then the ratio of $${R_B}$$ and $${R_C}$$ is ___________.

In the following circuit, the transistor is in active mode and $${V_C} = 2V.$$ To get $${V_C} = 4V,$$ we replace $${R_C}$$ with $${R_C}.$$ Then the ratio $$R{'_C}/{R_C}$$ is __________.