Solution:

The CPU scheduler is responsible for selecting a process from the ready queue and allocating the CPU to it. This scheduler makes decisions very frequently and is thus also called the Short Term Scheduler.

Explanation for other options:

• Long Term Scheduler: Selects processes from the job pool and loads them into memory; not called CPU scheduler.
• Medium Term Scheduler: Temporarily removes processes from memory to reduce CPU load; not CPU scheduler.
• Asymmetric Scheduler: Refers to scheduling in asymmetric multiprocessor systems; not the standard CPU scheduler.

Answer: (A) only