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: Medicine
Which of the following is not true about the risk factors of systemic sclerosis? 
Select and explain. 
A. Human CMV infection, B. Human parvovirus B 19 infection, C. Miners exposed to lead, D. Drugs like bleomycin
C: Miners exposed to lead
Answer: C: Miners exposed to lead 
Explanation: Answer- C. Miners exposed to leadPatients with Systemic sclerosis (SSc) have increased serum antibodies to human cytomegalovirus (hCMV), and antitopoisomerase-I (Scl-70) autoantibodies recognize antigenic epitopes present on the hCMV-derived proteins.Drugs implicated in SSc-like illnesses include bleomycin, pentazocine and cocaine, and appetite suppressants linked with pulmonary hypeension.