Teacher: why are you late?
Student: My dad told me to take our cow to bull.
Teacher(Angrily): Can’t your dad do it?
Student: No, only BULL can do it.

Teacher: Dhiraj, say something beginning with “I”.
Boby: I is ..
Teacher: No, Dhiraj, you must say I ‘m ..
Dhiraj: All right, I am the ninth letter of the alphabet.