Which among the following is not a symptom of Down's syndrome?

The correct option is B Pink eyes
Down syndrome is a chromosomal disorder which arises due to the trisomy of 21st chromosome. It is a monogenic disorder. Infants suffering from this disorder are usually mentally retarded and have a short life span. Besides this, short height, short wide neck, flat nose, short fingers, scanty hair and single horizontal crease on palm are other notable symptoms.
Pink eyes are associated with albinism which arises due to absence of melanin in retina and sclera.