Q.

Assertion ( A) :  The glomerular filtrate is progressively diluted as it moves up in the ascending limb of loop of Henle.
Reason ( R) : Ascending limb of loop of Henle is impermeable to water and permeable for the reabsorption of Na+ and Cl-.
The correct option among the following is 

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a

A is true.  But R is false.

b

A is false.  But R is true.

c

A and R are true, R is correct explanation for A

d

A and R are true, but R is not correct explanation for A

answer is A.

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Detailed Solution

Ascending limb of Henles loop is permeable for electrolytes,impermeable to water. As electrolytes are transported into surrounding medullary interstitium, glomerular filtrate gets diluted.

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