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
CREST syndrome includes all except: 
Select and explain. 
A. Calcinosis cutis., B. Reynaud's phenomenon, C. Tetanus., D. Sclerodactyly.
C: Tetanus.
Answer: C: Tetanus. 
Explanation: Calcinosis cutis, Raynauds phenomenon, Esophageal dysfunction, Sclerodactyly and Telangiectasia.