<prompt> B ALL is due to-T cellsImmature B cellsImmature T cellsBoth T B cells  <response>: ALL are neoplasms composed of immature B pre B or T pre T cells which are referred to as lymphoblasts. About 85 are B ALLs which typically manifest as childhood acute leukemias Ref: Robbins and Cotran Pathologic basis of disease.South Asia Edition volume 1.page no,.590 