Final answer:
Ritalin is used for treating ADHD while Prozac is used for treating depression.
Step-by-step explanation:
Ritalin is a medication commonly used to treat Attention Deficit Hyperactivity Disorder (ADHD). ADHD is a neurodevelopmental disorder characterized by symptoms of hyperactivity, impulsiveness, and inattention. On the other hand, Prozac is an antidepressant medication that is used to treat depression and other mental health conditions such as anxiety disorders and eating disorders.
Therefore, the correct answer to the question is B. ADHD ; depression.