If $$\Delta $$ is the depth of water in metres, B is the number of days of base period and D is the duty in hectare/cumec, the relationship which holds good, is

A. $${\text{D}} = \Delta \frac{{8.64{\text{D}}}}{{\text{B}}}$$

B. $${\text{B}} = \Delta \frac{{8.64{\text{B}}}}{{\text{D}}}$$

C. $${\text{D}} = \frac{{8.64\Delta }}{{\text{B}}}$$

D. $$\Delta = \frac{{8.64{\text{B}}}}{{\text{D}}}$$

Answer: Option D