Match the following
| Set 1 | Set 2 |
| (1) Chromatography | (p) Chemical process |
| (2) Poling | (q) Difference in solubility |
| (3) Liquation | (r) Difference in melting point |
| (4) Zone refining | (*) Low boiling point metal |
| | (t) Adsorption |
(a) 1-r, 2-p, 3-*, 4-q
(b) 1-q, 2-r, 3-p, 4-*
(c) 1-t, 2-p, 3-*, 4-q
(d) 1-p, 2-p, 3-*, 4-q
