When N-type semiconductor is heated?

جب این قسم کے سیمی کنڈکٹر کو گرم کیا جاتا ہے؟

Number of electrons increases while that of holes decreases

Number of holes increases while that of electrons decreases

Number of electrons and holes remain same

Number of electron and holes increases equally

Due to heating, when a free electron is produced than simultaneously a hole is also produced.