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: Pharmacology
Mucopolysaccharide having anticoagulant action is? 
Select and explain. 
A. Heparin, B. Phenindione, C. Rivoroxaban, D. Dabigatran
A: Heparin
Answer: A: Heparin 
Explanation: Ans. is 'a' i.e., Heparin Heparin It is a parenteral indirect thrombin inhibitor. It is a on uniform mixture of straight chain polysaccharides with molecular weight 10, 000 - 20, 000. It contains polymers of two sulfated disaccharide units D glucosamine L iduronic acid and D glucosamine D glucuronic acid. Heparin is the strongest organic acid present in the body.