Which one of the following correctly explains the function of a specific part of the human nephron?

• A
  Podocytes : create minute spaces (slit pores) for the filtration of blood into the Bowman's capsule
• B
  Henle's loop : most reabsorption of the major substances from the glomerular filtrate
• C
  Distal convoluted tubule : reabsorption of $K^+$ ions into the surrounding blood capillaries
• D
  Afferent arteriole : carries the blood away from the glomerulus towards renal vein.