In this task, you need to provide the correct option for a given problem from the provided options.
--------
Question: Problem: the sub - duplicate ratio of 25 : 16 is 
Options: a ) 4 : 3 , b ) 1 : 2 , c ) 1 : 3 , d ) 5 : 4 , e ) 2 : 3

Answer: d


Question: Problem: a jar contains a mixture of two liquids acid ( nitric acid ) and base ( ammonium chloride ) in the ratio 4 : 1 . when 10 litres of the mixture is taken out and 10 litres of liquid base is poured into the jar , the ratio becomes 2 : 3 . how many litres of liquid acid was contained in the jar ? 
Options: a ) 14 lts , b ) 18 lts , c ) 20 lts , d ) 16 lts , e ) 26 lts

Answer: d


Question: Problem: find the compound ratio of ( 2 : 3 ) , ( 5 : 3 ) and ( 2 : 5 ) is 
Options: a ) 1 : 2 , b ) 2 : 3 , c ) 3 : 4 , d ) 4 : 9 , e ) 3 : 2

Answer:
d