question_answer

Match Column I (Type of glass) with Column II (Composition) and select the correct answer using the codes given below the columns.

	Column I		Column II
A.	Soda glass	1.	Mixture of potassium and lead silicates
B.	Crown glass	2.	Mixture of sodium, barium, zinc and magnesium silicates
C.	Flint glass	3.	Mixture of sodium, zinc and magnesium silicates
D.	Pyrex glass	4.	Mixture of sodium and calcium silicates

Codes:

A)  A-4, B-1, C-2, D-3

B)  A-3, B-2, C-1, D-4

C)  A-4, B-2, C-1, D-3

D)  A-3, B-1, C-2, D-4