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: Ophthalmology
Which of the following is the only reversible cataract: 
Select and explain. 
A. Senile cataract, B. Cataract in galactosemia, C. Congenital cataract, D. None
B: Cataract in galactosemia
Answer: B: Cataract in galactosemia 
Explanation: Ans. Cataract in galactosemia