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: Unknown
All have chances of DVT except - 
Select and explain. 
A. Hip fracture & resting, B. Young < 25yrs age, C. Decreased protein C & S, D. Factor V defect
B: Young < 25yrs age
Answer: B: Young < 25yrs age 
Explanation: Ans. is 'b' i.e., Young <25 yrs. Risk factors for DVT -o Advanced Age# Major abdominal.''orthopedic surgery/major trauma# Prolonged immobilisation (>3 days)# HRT and OCP use# Pregnancy and puerperium# Malignancy# Obesity/Diabetes/CHF/Shock# Nephrotic syndrome# Varicose veins# Antiphospholipid antibody syndrome# Myeloproliferative disease# Tobacco Smoking