| Column-I | Column-II |
|---|---|
| (a) Non-tax Revenue | (ii) Free-rider |
| (b) Indirect Tax | (i) Goods and Services Tax |
| (c) Capital expenditure | (iii) Borrowings |
| (d) Private goods | (iv) Rivalrous in nature |
Which element is a strong reducing agent in +2 oxidation state and why?

| Time (Hours) | [A] (M) |
|---|---|
| 0 | 0.40 |
| 1 | 0.20 |
| 2 | 0.10 |
| 3 | 0.05 |