All increase the chances of Deep Vein Thrombosis except-

Ans. is 'c' i.e., Superficial thrombophlebitis Superficial thrombophlebitis is localized to the superficial veins. It does not result in deep venous thrombosis or pulmonary embolism. o Oral contraceptive pills : Contributes by increasing blood hypercoagulability o Hypeension : Contributes by endothelial injury which results from the hemodynamic stress associated with hypeension. H.T. may precipitate congestive hea failure and hence stasis. o Myocardial infarction : immobilization following myocardial infarction may account for its high incidence in such cases. This contributes by stasis.