The correct option is C Height of the Eiffel Tower < Height of the Burj Khalifa
Height of the Eiffel Tower is smaller than the Burj Khalifa.
Hence, we will use smaller than sign ''<'' to represent it, it means that the value on the left side is strictly smaller than the value on the right side.
∴Height of the Eiffel Tower < Height of the Burj Khalifa
Therefore, (c.) is the correct choice.