Final Answer:
Tourniquets involve a. Pliable strap, b. Blood pressure cuff and c. Velcro strap. Option D "All of the above" is answer.
Step-by-step explanation:
Tourniquets are devices used to control bleeding by applying pressure to a limb or extremity. In the context of the options provided:
(a) Pliable strap refers to a flexible and adjustable material that can be tightened to constrict blood flow.
(b) Blood pressure cuff, when appropriately applied, can act as an improvised tourniquet by restricting blood flow.
(c) Velcro strap is another type of material that can be used to create a tourniquet effect.
Therefore, all the options (a, b, c) are valid types of tourniquets, making option (d) "All of the above" the correct answer.
Option (d) All of the above is the correct answer.