Explanation

(a) $\alpha\ and\ \beta$-parameters of a transistor are defined as
$\alpha = \frac{i_{C}}{i_{E}}$ and $\beta = \frac{i_{C}}{i_{B}}$
where $i_{C} =$ collector current,
$i_{E} =$ emitter current,
$i_{B} =$ base current
As $i_{B}$ is about 1 to 5% of $i_{E},$ $\alpha\ is\ about\ 0.95$ to 0.99 and $\beta\ \left( \frac{\alpha}{1 - \alpha},bysimple\ mathematics\ \right)$ is about 20 to 100, we conclude that $\beta > \alpha$.