For each 200 rupees spent by the research department, sales department spends 20 rupees. For every 400 rupees spent by the sales department the advertising department spends 150 rupees. The triple ratio f the money spent by the research department to the money spent by the sales department to the money spent by the advertising department fan be expressed as `2:1:5` b. `20 :4:1` c. `40 :8:3` d. `80 :8:3`