Correct Answer - Option 4 : C
Calculation:
We have to check the gradual increase in distance covered from Friday to Tuesday
In Bus 1
Friday = 450, Saturday = 500, Sunday = 490, Monday = 510, Tuesday = 700
On Sunday the decrease in distance covered.
In Bus 2
Friday = 500, Saturday = 500, Sunday = 550, Monday = 600, Tuesday = 400
On Friday and Saturday, there is no increase in distance travelled and on Tuesday the decrease in distance travelled.
In Bus 3
Friday = 475, Saturday = 500, Sunday = 525, Monday = 600, Tuesday = 700
The gradual increase in distance travelled on each day
In Bus 4
Friday = 500, Saturday = 550, Sunday = 600, Monday = 600, Tuesday = 500
On Tuesday the decrease in distance travelled from the previous day
∴ The gradual increase in distance travelled is on Bus 3.