A free program for Android, by Vedantu.
The Vedantu app is designed to assist teachers and mentors in solving student doubts on the go through a convenient chat interface. It allows you to pick doubts of your selected subject and grade and explain it to the students using text and images. You can also ask questions on the app.
As soon as you log in, you will see the questions you have selected. Choose the correct answer and mark the one you have given as the right answer.
You can see the student's answers and marks on the screen.
You can also see the student's name and the class in which he/she is enrolled.