The correct answer is D. A good teacher is one who always tells his/her students that from where they can get answers to their queries.
A good teacher should be able to answer all the questions asked by students, but they should also be able to guide students to find the answers to their own questions. A good teacher should encourage students to learn outside of the classroom, and they should be able to provide resources to help students do so.
Option A is not correct because a good teacher should encourage students to ask questions. Option B is not correct because a good teacher should not just answer questions, but should also guide students to find the answers to their own questions. Option C is not correct because a good teacher should encourage students to learn outside of the classroom.