The origin of the kidney and ureter in $Rana$ $tigrina$ is:

Malpighian body or renal corpuscle is

Choose the correct option:
$(1)$ $ANF$ is secreted when blood pressure decreases / blood pressure increases.
$(2)$ Renal pyramids are located in the renal cortex / renal medulla.

Arrange the following parts of the nephron in a sequential manner and select the correct option accordingly.
$I.$ Glomerulus
$II.$ Bowman's capsule
$III.$ Henle's loop
$IV.$ Proximal convoluted tubule $(PCT)$
$V.$ Collecting duct
$VI.$ Distal convoluted tubule $(DCT)$

The figure shows the human urinary system with structures labeled $A$ to $D$. Select the option which correctly identifies them and gives their characteristics and/or functions.

The Bowman's capsule is