The coagulating power of electrolytes having inos `Na^(o+),Al^(3+)` and `Ba^(2+)` for arsenic sulphide sol increases in the order
(a)`Na^(o+)ltBa^(2+)ltAl^(3+)`
(b)`Ba^(2+)ltNa^(o+)ltAl^(3+)`
(c)`Al^(3+)ltNa^(o+)ltBa^(2+)`
(d)`Al^(3+)ltBa^(2+)ltNa^(o+)`

Options

A. `Al^(3+) lt Ba^(2+) lt Na^(+)`
B. `Na^(+) lt Ba^(2+) lt Al^(3+)`
C. `Ba^(2+) lt Na^(+) lt Al^(3+)`
D. `Al^(3+) lt Na^(+) lt Ba^(2+)`

Answer

B