Q. The materials used in the manufacture of glass are
1.sand (silica)
2.soda ash (sodium carbonate)
3.common salt (sodium chloride)
4.lime stone (calcium carbonate) Select the correct answer by using the code below,

• (A) 1, 2, 3 and 4
• (B) 1, 2 and 4 only
• (C) 1, 2 and 3 only
• (D) 2, 3 and 4 only