Correct Answer - Option 4 :
Quantity A > Quantity B
Quantity A:
Ratio of Steel, Zinc and Brass is 2 : 3 : 5.
(Share of the item/sum of the ratio) × Total weight of the object
⇒ Sum of the ratio = 2 + 3 + 5
⇒ 10
Amount of brass used = (5/10) × 500
⇒ 250 mg.
Quantity B: 25 mg
∴ Quantity A > Quantity B