I asked a question whose title was Two discrete valuation rings one of which is contained in another(Two discrete valuation rings, one contained into another). It was closed, but I have no idea why it was closed.
The quesion was: Let $A$ and $B$ be discrete valuation rings having the same field of fractions. Suppose $A \subset B$. Then $A = B$?
I wrote the motivation since some users tend to vote to close a question without it.