Answer:
Out of the listed options, only a. Erythrocytes, b. Leukocytes, and c. Platelets are components of the formed elements.
Formed elements are cells and cell fragments suspended in liquid plasma. They make up about 45% of whole blood volume.
Plasma is the liquid portion of blood, containing water, proteins, dissolved gases, electrolytes, and nutrients. It's not a formed element itself.
