holes are majority carriers and trivalent atoms are dopants.
electrons are minority carriers and pentavalent atoms are dopants.
electrons are majority carries and pentavalent atoms are dopants.
holes are minority carriers and trivalent atoms are dopants.
Solution
The correct option is (A)
Concept-Based Question: Option A is true because trivalent atoms are used to dope tetravalent semiconductor materials such as Si or Ge. Doping with impurity in a minor amount generates the majority of carriers (as roughly one impurity atom generates one hole!).