Match List-I (Type of glass) with List-II (Composition) and select the correct answer:

List-I	List-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 aluminium silicates
d. Pyrex glass	4. Mixture of sodium and calcium silicates

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

Answer: Option C