With reference to "water vapour", which of the following statements is/are correct? 1. It is a gas, the amount of which decreases with altitude. 2. Its percentage is maximum at the poles. Select the answer using the code given below:

Statement 1 is correct because water vapour is the gaseous form of water and its concentration decreases rapidly with altitude as it is concentrated in the lower layers of the atmosphere. Statement 2 is incorrect because water vapour content is maximum in the warm, humid tropics (near the equator) and minimum at the cold, dry poles, as the air's capacity to hold moisture depends on temperature. This question tests the core concept of the vertical and horizontal distribution of atmospheric moisture.