This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetic and genetic disorders, Subject name: Pediatrics
Triangular facies is indicative of ________ 
Select and explain. 
A. Russell-Silver syndrome, B. Down's syndrome, C. Mobius syndrome, D. Nephrotic syndrome
A: Russell-Silver syndrome
Answer: A: Russell-Silver syndrome 
Explanation: Triangular facies is indicative of Russell-Silver syndrome. Russell-Silver Syndrome: Clinical features: Sho stature, triangular face(small jaw and pointed chin), microcephaly, limb and facial symmetry, 5th finger clinodactyly A few cases are due to genomic imprinting disorder involving chromosome 11 Ref: Nelson textbook of pediatrics 21st edition Pgno: 286, 3476