Four rods of equal length and thickness but of different materials are coated with wax in the same manner. They are fixed to a trough containing hot water. The given diagram illustrates what happens to the wax on each rod after five minutes. What can you conclude from the given diagram? (i) The aluminium rod conducts heat better than the brass rod. (ii) The aluminium rod conducts heat better than the copper rod. (iii) The glass rod conducts heat better than the copper rod.(iv) The wax on the copper rod melts faster than the wax on the brass rod.

• A. (i) and (iv)
• B. (ii) and (iii)
• C. (i), (ii) and (iii)
• D. (ii), (iii) and (iv)