The current amplification factor $\alpha$ of a common base transistor and the current amplification

Question

The current amplification factor $\alpha$ of a common base transistor and the current amplification factor $\beta$ of a common emitter transistor are not related by

Professor PC Thomas Classes · Answer

Current amplification factors are related by $\beta = \frac{\alpha}{1 - \alpha}$. Option D is the incorrect relation.