Given below are two statements.

Statement I :  Clot is a dark reddish brown scum formed at the site of injury, in order to stop the bleeding. 

Statement II : An injury stimulates the platelets to release certain factors which activate coagulation.

In light of the above statements, choose the correct answer from the options given below.

Statement I is correct in describing a clot as a dark reddish-brown scum formed at the site of injury to stop bleeding. When a blood vessel is injured, a series of events occur to form a clot, which is a mesh-like structure composed of fibrin, platelets, and other clotting factors. Blood clotting prevents and controls bleeding.

Statement II is also correct because an injury stimulates platelets to release certain factors that initiate the process of coagulation. When a blood vessel is damaged, platelets adhere to the site of injury and become activated. These activated platelets release certain substances that promote the activation of clotting factors in the blood plasma, leading to the formation of a stable clot.