milk and water

There are two containers A and B. A contains n liters of pure milk and B contains n liters of water. One liter of pure milk is transfered from A to B. Now 1 litre of the solution from B is transferred back to A. The ratio of water to milk in the 1 litre transferred from B to A is k. Once again, 1 lt of the solution is transferred from A to B. What is the ratio of water to milk in this transferred one liter?
a. n  : k 2
b. n2 : k
c. 1 : √nk
d. All of the above

ans is dbecasue if we assume

ans is d
becasue if we assume n=10 then from B to A transfer we got value of K=10 and from A to B=1/10

so all option are possible

Little Star

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@jigar_er_civil

Sorry I cldnt understand your logic
Could you please explain it

above men's method is correct but..

it gives a answer of n^2/k

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