Whats good about Das is that his problems on the board is the same things as what is on the exams. Study hard and you cant fail this class
he always says in class "come to my office if you have any prob.". but when u go to his office, he says always busy and mostly with bad attitude. 2faced teacher
Will really help you to pass, as long as you have a good idea of what you are doing. But whatever happens, don't challenge him!!! He's a Doctor!!!