Disperse phase and the dispersed media in the blood respectively are

• Blood is composed of blood cells suspended in blood plasma. 
• Plasma constitutes 55% of blood fluid, it has mostly water (around 92% by volume) and contains proteins, glucose, mineral ions, hormones, carbon dioxide, and blood cells (RBC, WBC, etc.) themselves. 
• Albumin is the main protein in plasma, and it functions to regulate the colloidal osmotic pressure of blood. Albumins are solids.

And hence blood is solid in the liquid-type colloid.

Hence option C is the correct answer.