From the histogram, the maintenance cost in the year:
1995−1996 is Rs. 2000
1996−1997 is Rs. 3000
1997−1998 is Rs. 1500
1998−1999 is Rs. 2500
1999−2000 is Rs. 4850
2000−2001 is Rs. 5000
2001−2002 is Rs. 7200.
Then, the maintenance cost is Rs. 2500 in the year 1998−1999.
Hence, option A is correct.