Final answer:
Autism Spectrum Disorder (ASD) is the condition that describes an inability to form normal social relations and a tendency to be self-absorbed, featuring impaired social skills and various other symptoms.
Step-by-step explanation:
The condition that involves the inability to develop normal social relations and a tendency to be self-absorbed is known as Autism Spectrum Disorder (ASD). ASD is a neurodevelopmental disorder characterized by impaired social skills, repetitive motor behaviors, strict adherence to certain rituals, and preoccupation with specific subjects. Children with autism may have difficulties making and maintaining eye contact, reading social cues, and feeling empathy for others.
Moreover, some may develop epilepsy and intellectual disability, particularly with disorders like Fragile X syndrome. However, because ASD is a spectrum disorder, it affects individuals differently, with some having very functional and good-to-excellent language skills.