At Chamman Ice cream Parlour ice cream was sold in three flavours: mango banana and vanilla. One day total 900 cups were sold and the ration of mango to banana to vanilla was 5:12:3. How many vanilla cups were cold that day?

1. A Option A: 450
2. B Option B: 135
3. C Option C: 360
4. D Option D: 390

How we write and check questions