Medicine Patient with elfin facies and friendly behaviour; increased curiosity, Supravalvular aortic stenosis, mental depression etc. The diagnosis is A Williams syndrome B Down's syndrome C Treacher-Collins syndrome D Morquio's syndrome 💡 Explanation Patient with elfin facies and friendly behaviour; increased curiosity, Supravalvular aortic stenosis, mental depression etc. The diagnosis is ✓ Correct Answer: A. Williams syndrome