A  child has been brought to OPD with mental retardation. On examination, microcephaly, triangular face, fifth finger clinodactyly is found. What is the most probable diagnosis: (A) Russel Silver Syndrome, (B) Angelman Syndrome, (C) Treacher Collin Syndrome, (D) Pierre - Robin Syndrome
Answer is A. Features of Russel Silver Syndrome

Triangular face
Microcephaly
Short stature
Low birth weight
Fifth finger clinodactyly.