<prompt> 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 diagnosisRussel Silver SyndromeAngelman SyndromeTreacher Collin SyndromePierre - Robin Syndrome  <response>: Features of Russel Silver SyndromeTriangular faceMicrocephalyShort statureLow birth weightFifth finger clinodactyly. 