This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
A lady complaining of occasional pain over her middle finger. The surgeon found a black spot.Pressing around the black spot didn&;t elicit any pain, while pain is sensed on pressing the spot. What is the diagnosis 
Select and explain. 
A. Haemangioma, B. Glomus tumour, C. A-V fistula, D. Melanoma
B: Glomus tumour
Answer: B: Glomus tumour 
Explanation: Glomus tumor, nail bed areas are a major site, appear as small purple black nodules, They develop from subcutaneous aeriovenous shunts. Pain on insignificant stimuli. (Occasional pain, can even be do to cold exposure) Bailey and love 27th edition, pg no. 614