Given below are six sentences, out of which sentences A and F are in the correct position. Sentences B, C, D and E are in a jumbled order. Select the option that gives the correct order.

A. Blood is a mixture of plasma and blood cells.
B. White blood cells (leukocytes) are an important part of the immune system.
C. Plasma is mostly water but also has protein, salts, fats and sugar (glucose). 
D. There are 3 types of blood cells – red blood cells, white blood cells and platelets.
E. Red blood cells (erythrocytes) carry oxygen to all cells in the body. 
F. Platelets (thrombocytes) make the blood clot and help stop bleeding.