The correct options are
B A Battery is a single unit which converts chemical energy to electrical energy to deliver a voltage while a cell is composed of a number of batteries in series to get increased voltage
D In the combination of cells, cells are connected in such a way that negative terminal of a cell is connected to negative terminal of the next cell
Both cell and battery store the chemical energy and then transforms the stored chemical energy into electrical energy. But the cell is a single unit with positive and negative terminal whereas the battery is a combination of cells connected end to end i.e. positive to the negative terminal.