This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
A neonate, on examination shows features of hypotonia and the following feature was observed. Probable chromosomal anomoly 
Select and explain. 
A. Patau syndrome, B. Edward's syndrome, C. Down's syndrome, D. Noonan syndrome
C: Down's syndrome
Answer: C: Down's syndrome 
Explanation: Features of Down's syndrome:-

Flat face
Hypotonia at birth
Increased Intercanthal distance
Epicanthal folds
Low set ears
protruding spots
Iris - Brushfield spots
Blue dot Cataract
Simian crease (Single palmar crease)
Sandal gap.