Deficiency of which vitamin cause the disease- night blindness?

Explanation

Uses of different forms of silica are as follows:
(i) Quartz is used as a piezoelectric material.
(ii) Quartz is used to make accurate clocks, modern radio and television broadcasting and mobile communications.
(iii) Silica gel is used as a drying agent and as a catalyst.
(iv) Kiesulghur, an amorphous form of silica is used in filteration plants.