Most common cause of convulsion on the First day of life in a newborn is –: (A) Anoxia, (B) Head Injury, (C) Hypoglycemia, (D) Hypocalcemia
Answer is A. Neonatal seizures

The most prominent feature of neurological dysfunction in the neonatal period are seizures.
The five major causes of neonatal seizures are -


Hypoxic ischemic enceplialopathy (hypoxia, anoxia) → most common       
Hypocalcemia 
Hypoglycemia
Meningitis
Polycythemia