Moderate

The biological anticoagulant is________________?

Correct answer: C. Hirundine

  • A. EDTA
  • B. Sodium citrate
  • C. Hirundine
  • D. Double oxalate mixture

Explanation

Hirudin is a natural anticoagulant found in leech saliva that directly inhibits thrombin. EDTA, citrate, and oxalate are laboratory anticoagulants rather than biological anticoagulants.

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