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

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 \({\eta }_{\mathrm{e}}≫{\eta }_{\mathrm{h}}\) while in a n-type semiconductor \({\eta }_{\mathrm{h}}≫{\eta }_{\mathrm{e}}\).