Which one of the following is correct regarding the excretion?
(a) Large amount of water from renal filtrate is reabsorbed in DCT and a less amount is reabsorbed by PCT.
(b) The descending limb of loop of Henle is completely impermeable to salts.
(c) Malpighian corpuscle is found in medulla region of kidney
(d) The colour of urine is pale yellow and is slightly alkaline in nature.