A coin is tossed two times. The number of possible outcomes is
When a coin is tossed once, the number of outcomes are two (Head and Tail) i.e., in each throw, the number of ways of showing a different face are .
Similarly tossing the coin for the second time, there are again the same two outcomes.
Thus, by the multiplication principle, the required number of possible outcomes is , i.e., .
Hence, option D is correct.