Which option is proper for event of callus cultre ?

• A. Explantcell divisioncallusadding cytokinintransform from cell to meristmatic tissue.
• B. Explantcalluscell divisionadding cytokinintransform from cell to merismatic tissue.
• C. Callusadding cytokinincell divisiontransform from cell to meristmatic tissueexplant.
• D. Cell divisionadding cytokinincallusexplanttransform from cell to meristmatic tissue.