When comparing the difficulty of the two types of serves in volleyball, the overhand serve (option B) is generally considered more difficult than the underhand serve (option A).
The overhand serve requires more skill, timing, and technique, as players need to make contact with the ball at a higher point and generate power and spin. In contrast, the underhand serve is typically easier to execute and is often used by beginners or in certain strategic situations.
If you have any further questions about volleyball techniques or rules, feel free to ask!