Pari, who is eight years old now, continues to cling to her parents and refuses to go to school without them. She screams, throws tantrums and feels fearful when she is left alone in a room by herself. These are characteristic features of:

Separation anxiety disorder

The correct answer is Option (3) → Separation anxiety disorder

Pari's behavior—clinging to her parents, refusing to go to school without them, and feeling fearful when left alone—are characteristic features of Separation Anxiety Disorder. This disorder is marked by excessive fear or anxiety concerning separation from home or from individuals to whom a person is attached. While it's normal for toddlers to experience some separation anxiety, it's considered a disorder when the fear is beyond what is appropriate for the developmental stage and causes significant distress or impairment in social, academic, or other important areas of functioning.