The correct relation between the transistor parameters $α$ and $β$ is -

$β=\frac{α}{1-α}$

The correct answer is Option (2) → $β=\frac{α}{1-α}$

The relationship between the transistor parameter $α$ (current gain in common base configuration) and $β$ (current gain in common emitter configuration).

$β=\frac{α}{1-α}$

or, $α=\frac{β}{β+1}$