The correct option is C insufficient platelets in the blood
Platelets are involved in the blood clotting process. They are extremely small and disc-shaped structures. About 2.5 - 4 lakh platelets are present per mm3 of blood. They form a meshwork and release blood clotting factors at the site of injury to prevent further bleeding. If there is a decrease in platelet count in the blood, then the blood will not be able to clot resulting in excessive bleeding.