Two bulbs of 500 watt and 200 watt are manufactured to operate on 220 volt line. The ratio of heat produced in `500 W` and `200 W`, in two cases, when firstly they are joined in parallel and secondly in series, will be
A. `5/2, 2/5`
B. `5/2,5/2`
C. `2/5, 5/2`
D. `2/5, 2/5`