Correct Answer: C

Rationale: The correct answer is 'C: Delusions.' Positive symptoms of schizophrenia involve an excess or distortion of normal functions. Delusions are fixed false beliefs that are not based in reality and are considered positive symptoms because they represent an addition of abnormal behavior or thoughts.

Correct Answer: B

Rationale: Regular monitoring of blood levels is crucial for patients taking risperidone to ensure the medication is at therapeutic levels and to prevent potential toxicity. This monitoring helps healthcare providers adjust the dosage as needed to optimize treatment outcomes and minimize adverse effects.

Correct Answer: B

Rationale: Teaching grounding techniques is an effective intervention for managing flashbacks in patients with PTSD. Grounding techniques help individuals focus on the present moment, which can reduce the intensity of flashbacks and promote a sense of safety and stability.

Correct Answer: D

Rationale: During a depressive episode in bipolar disorder, it is essential to encourage patients to express their feelings and concerns. This intervention helps them feel heard, supported, and can aid in managing their emotions effectively.

Correct Answer: C

Rationale: Weight gain is a common side effect associated with lithium therapy. It is essential for the nurse to monitor the patient for changes in weight as it can impact the individual's overall health and well-being. Patients on lithium should be advised on dietary and lifestyle modifications to manage potential weight gain and maintain a healthy weight.