Q. According to Indian standards, the dispersing solution used in pipette method, for the determination of size of particle consists of ?

• (A) 7 g sodium carbonate, 43 g sodium hexameta-phosphate and 1 litre distilled water
• (B) 7 g sodium carbonate, 33 g sodium hexameta-phosphate and 1 litre distilled water
• (C) 7 g sodium carbonate, 23 g sodium hexameta-phosphate and 1 litre distilled water
• (D) any one of the above