funny joke- akpos the wise dude

In a chemistry class, the teacher asked the students to name the atmospheric gases: musa: oxygen. Teacher: Good. Chidi: Nitrogen. Teacher: That's my boy!!!! Kemi: Hydrogen. Teacher: Wonderful!!!!!!! Akpos: Tear gas. Teacher: Akpos, you have one more chance, else you will be punished. Akpos thinks hard and says: Fabregas good day, one word for akpos