In the use of transistor as an amplifier $I_f \alpha =\large\frac{I_c}{I_e}$ and $\beta =\large\frac{I_c}{I_b}$ where $I_c$- collector current $I_b$- base current $I_e$- emitter current then

Question

$(a)\;\beta= \large\frac{1+\alpha}{\alpha} \\ (b)\;\beta = \frac{\alpha}{1+\alpha} \\ (c)\;\beta =\frac{1- \alpha}{\alpha} \\ (d)\;beta = \frac{\alpha}{1- \alpha} $