question_answer

Match List-I  with List-II and select the correct answer using the codes given below the lists:

List-I (Heat treatment)		List-II (Effect on the properties)
A.	Annealing	1.	Refined grain structure
B.	Nitriding	2.	Improves the hardness of the whole mass
C.	Martempering	3.	Increases surface hardness
D.	Normalizing	4.	Improves ductility.

Codes:

A) A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1

B) A\[\to \]1, B\[\to \]3, C\[\to \]4, D\[\to \]2

C) A\[\to \]4, B\[\to \]2, C\[\to \]1, D\[\to \]3

D) A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4