Answer:
b. separation anxiety disorder
Step-by-step explanation:
Separation anxiety disorder -
This disorder is observed in very young age of child development , where the child gets very sad and angry during the phase of separation , is referred to as separation anxiety disorder.
The symptoms of this disorder is as follows -
1. repeated nightmares ,
2. headaches , stomachaches ,
3. fear of separation ,
4. excessive worry and distress ,
5. trauma of separation.
Hence, from the given scenario of the question,
Rahul is showing the symptoms of separation anxiety disorder.