Schleiden and Schwann proposed a cell theory according to which all cells are formed from preexisting cells. After the discovery of protoplasm by Corti, Dujardin observed a living juice inside the cells and named it as sarcode. Purkinje coined the term protoplasm while observing sap of plant cells. Max Schultze established similarity between protoplasm and sarcode that leads him to propose a theory which is called as the protoplasmic theory by Hertwig. This theory states that protoplasm is the physical basis of life. So answer B is correct.