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
Raynaud's phenomenon is seen in -  a) Scleroderma  b) Reiter 's disease   c) Rheumatoid arthritis   d) Behcet's syndrome  e) Mixed connective tissue disease 
Select and explain. 
A. ace, B. acd, C. abc, D. cde
A: ace
Answer: A: ace 
Explanation: None