There is a test tube with no label, it can be water, aldehyd…

There is a test tube with no label, it can be water, aldehyde, ketone, or methyl ketone. Using the following test results, label test tube A? Unknown   2,4-DNPH Test      Iodoform Test          Tollen’s Test     A         _____ (+)_____   ______ (-)______       ______ _(-)_______