Assertion (A) : n – p – n transistor is preferred than p – n – p transistor.

Reason (R) : The mobility of electrons is greater than the mobility of holes and majority charge carriers in n-p-n transistor are electrons.

Both A and R are correct. R supports A.

Electrons are the predominant carriers in the NPN transistor. Additionally, holes make up the majority of carriers in the PNP transistor. We are all aware that electrons have more mobility than holes. NPN is by far the superior and preferred option when it comes to mobility.