In the given questions, two quantities are given, one as ‘Quantity I’ and another as ‘Quantity II’. You have to determine relationship between two quantities and choose the appropriate option: ‘a’ liter of mixture A, contains milk and water in ratio 2 : 3, are mixed in mixture B, contains water and milk in 3 : 1 ratio, then ratio of milk and water becomes 41 : 99 and when ‘a’ liter of mixture B mixed in mixture A then ratio of milk and water become 7 : 13. Total mixture of B is 20 liter more than that of mixture A. (i) Quantity I: Initial quantity of milk in mixture A. (ii) Quantity II: Initial quantity of milk in mixture B.