Which of the following is the most specific early social communication deficit suggesting autism spectrum disorder in a toddler?

• A Delayed walking
• B Preference for playing alone
• C Frequent tantrums
• D Lack of pointing to show objects by 18 months ✓

Explanation

Joint attention deficits, such as lack of pointing to share interest, are early specific markers of autism. Delayed walking is a motor milestone and not specific to autism. Tantrums and solitary play can occur in typical development. Absence of pointing by 18 months is a key red flag.

Reference: Nelson Textbook of Pediatrics, 21st ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.