question_answer

Match List-I (Welding processes) with List-II (Features) and select the correct answer using the codes given below the Lists:

List-I		List-II
A.	Ultrasonic welding	1.	Gas heated to ionized condition for conduction of electric current
B.	Plasma arc welding	2.	High frequency and high intensity vibrations
C.	Plasma arc welding	3.	Concentrated steam of high-energy Electrons
		4.	Exothermal chemical reaction

Codes:

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

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

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

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