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: Biochemistry
The molecule, which is the initiator of cataract formation in the eye lens and whose 1-phosphate derivative is responsible for the liver failure, is 
Select and explain. 
A. Sorbitol, B. Mannitol, C. Inositol, D. Galactitol
D: Galactitol
Answer: D: Galactitol 
Explanation: Galactitol

Galactitol and sorbitol both can cause cataract.
But there is one more information in the question, i.e. 1-phosphate of that metabolic is responsible for the liver failure. Galactose-1-phosphate cause liver failure in galactosemia.
So, the examiner is asking about cataract in galactose