Match the list-I and list-II using the correct code given below the list.
| List-I |
List-II |
| A. Manufacture of soap |
1. Na2CO3.10H2O |
| B. Mild antiseptic |
2. Liquid Na metalli |
| C. Softening of hard water |
3. NaOH |
| D. Coolant in nuclear reactor |
4. NaHCO3 |
Code: (a) A - 4, B - 3, C - 2, D - 1
(b) A - 3, B - 4, C - 1, D - 2
(c) A - 2, B - 1, C - 3, D - 4
(d) A - 1, B - 2, C - 4, D - 3
