Choose incorrect sentence.
$(I)$ Malpighian corpuscles, $PCT$ and $DCT$ the nephron are situated in medulla of the kidney
$(II)$ The loop of henle dips into medulla.
$(III)$ In juxta medullary nephrons, the loop of henle is too short and extends very little into the medulla.
$(IV)$ Vasa recta is absent or highly reduced in cortical nephrons.
$I, II $
$II, IV $
$I, III $
$III, IV$
$A :$ Kidneys are retroperitoneal in position.
$R :$ Kidneys are covered with peritoneum only on ventral surface.
The composition of glomerular filtrate and urine is not same. Comment.
The cortex extends in between the medullary pyramids as renal columns called