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: Surgery
About Mondor's disease -a) Superficial thrombophlebitisb) Lymphatic infiltration tumour cellc) Cord like apperance of subcutanous veinsd) Occurs all over the body 
Select and explain. 
A. ac, B. bc, C. ad, D. b
A: ac
Answer: A: ac 
Explanation: None