Assertion (A): We cannot form a p-n junction diode by taking a slab of a p-type semiconductor and physically joining it to another slab of a n-type…

Assertion (A) : We cannot form a p-n junction diode by taking a slab of a p-type semiconductor and physically joining it to another slab of a n-type semiconductor. Reason (R) : In a p-type semiconductor $\displaystyle \eta_{\mathrm{e}} \gg \eta_{\mathrm{h}}$ while in a $\displaystyle n$-type semiconductor $\displaystyle \eta_{\mathrm{h}} \gg \eta_{\mathrm{e}}$.