The following table shows the expenditure of a factory (in ₹ lakh) per annum on different heads over the given years.
| Year/Expenditure Head | Salary | Transport | Bonus | Loan Interest |
|---|---|---|---|---|
| 1998 | 125 | 38 | 8 | 25 |
| 1999 | 135 | 45 | 18 | 37 |
| 2000 | 149 | 57 | 37 | 39 |
| 2001 | 153 | 63 | 50 | 43 |
What was the average expenditure (in ₹ lakh) on transport per year that the factory had to pay during the given period?
1
56.63
2
48.75
3
50.75
4
45.58