Cataract associated with convulsion is seen in –
Galactosemia is disease in which convulsions are associated with cataract.
You should keep in mind that toxoplasmosis also causes cataract with convulsions, but it is congenital toxoplasmosis (not acquired).
If congenital is not mentioned along with toxoplasmosis it usually refers to acquired toxoplasmosis. Therefore, option a is not correct here.
Toxoplasmosis
Tay Sac's disease
Galactosemia
Birth asphyxia with prematurity