Final answer:
Among the side effects listed for MPA and CPA medications, increased energy levels are generally not a known side effect. Instead, these drugs can cause reduced mental performance and lack of motivation, which are opposite effects.
Step-by-step explanation:
The student is asking about the side effects of MPA (medroxyprogesterone acetate) and CPA (cyproterone acetate), which are medications used for various medical treatments. Among the listed options, nausea, headache, and weight gain are known possible side effects. However, increased energy levels are typically not associated with these medications. On the contrary, these medications can sometimes lead to reduced mental performance and lack of motivation, which would not typically result in an increase in energy levels. Hence, the correct answer to the student's question is option 4: Increased energy levels.