is a mental disorder characterized by absent mental smile, lack of eye contact, abnormal social play and inability to communicate in children.

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E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) p. 15507-15510
E6 Kaplan Sadock's Synopsis of Psychiatry-2022 (pp 1-3768 of 3768) p. 390-392
E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 423-425
Practise the full AIIMS Raipur lecturer 2021
Attempt every question from this paper in a timed mock, then review the full solution for each one.