Tilak's salary increases by 15% in the first year, decreases by 20% in the second year and increases by 25% in the third year. If Tilak's salary after these three years is Rs. 23,000, then find the salary of Tilak in the begianing of these 3 years.

A

Rs. 20,000

B

Rs. 18,000

C

Rs. 15,000

D

Rs. 25,000