Multiple choice

To store blood, some anticoagulant is added. It can be

  1. NaCl

  2. Sodium oxalate

  3. KCl

  4. Thromboplastin

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sodium oxalate prevents blood clotting by binding calcium ions, which are essential cofactors in the coagulation cascade. By removing calcium, the anticoagulant disrupts the clotting process and keeps blood in liquid form for storage.