Statement A: Space waves are used for line-of-sight communication (like TV broadcasting and microwave links) and also for satellite communication, as they travel in a straight line and are not reflected by the ionosphere. This statement is true. Statement B: Sky waves are used for long-distance radio communication. They are reflected by the ionosphere. The frequency range for sky wave propagation is typically from about 3 MHz to 30 MHz. Frequencies above 40 MHz are generally too high to be reflected by the ionosphere and are used for line-of-sight or space wave communication. Therefore, this statement is false.