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
Tumor suppressor gene is not involved in ? 
Select and explain. 
A. Breast cancers, B. Neurofibromatosis, C. Multiple endocrine neoplasia, D. Retinoblastoma
C: Multiple endocrine neoplasia
Answer: C: Multiple endocrine neoplasia 
Explanation: o Multiple endocrine neoplasia involves RET protooncogene (not tumor suppressor gene).