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: Pathology
A 45 year old male patient complains of blurred vision. Patient has a habit of smoking and is chronic alcoholic. Investigations reveal that plasma homocysteine level is 80µmol/L. Which type of thrombosis can occur in this patient 
Select and explain. 
A. Arterial, B. Venous, C. Both 1 and 2, D. None of the above
C: Both 1 and 2
Answer: C: Both 1 and 2 
Explanation: Hyperhomocystinemia is the only mixed disorder, which can cause both venous and arterial thrombosis.