Explanation: A typical dry cell, such as the common carbon-zinc cell (also known as a Leclanché cell), functions through an electrochemical reaction. 1. **The Negative Electrode (Anode):** In this type of cell, the outer casing is made of zinc. The zinc acts as the negative electrode, or anode. During discharge, the zinc undergoes oxidation, releasing electrons into the external circuit. This makes statement A ("The negative electrode is made of zinc") correct. 2. **The Positive Electrode (Cathode):** A carbon rod is placed in the center of the cell, surrounded by a paste containing manganese dioxide and other materials. The carbon rod serves as the positive electrode, or cathode. While carbon itself doesn't react, it provides a conductive surface for the reduction reaction to occur, accepting electrons from the external circuit. This makes statement B ("The positive electrode is made of carbon") correct. Since both statements A and B accurately describe the electrodes in a usual dry cell, the correct answer is D, encompassing both truths.