Waking up at night, screaming with fear, at 2.5 years age, is generally a manifestation of-

Ans. is 'd' i.e., Separation anxiety o Separation anxiety disorder is characterized by unrealistic and persistent worries of possible harm befalling the affected child or his or her primary caregivers, reluctance to go to school or sleep without being hear the parents persistent avoidance of being alone, nightmares involving themes of separation numerous somatic symptoms and complaints of subjective distress.