State the role of blood capillaries associated with the nephrons in kidney

The role of blood capillaries associated with the nephrons are:
(a) To bring blood capillaries under pressure by afferent arteriole.
(b) Formation of glomerulus in Bowman’s capsule.
© Formation of network of capillaries around the nephrons.
(d) Selective reabsorption of water, glucose, salts
vitamins and other necessary things.