Kidneys are reddish-brown,bean-shaped structures situated between the levels of . . . . . . thoracic and . . . . . . lumbar vertebrae.

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.

Read the following four statements $(A-D)$ and select the correct ones:
$(A)$ The medulla of the kidney is divided into a few conical masses projecting into the calyces.
$(B)$ The cortex of the kidney extends in between the medullary pyramids as renal columns called columns of Bertini.
$(C)$ The kidneys are situated in the ventral part of the thoracic region in the human body.
$(D)$ Each kidney of an adult human measures $10-12 \ cm$ in length,$5-7 \ cm$ in width,$2-3 \ cm$ in thickness,with an average weight of $120-170 \ gm$.

Provide definitions/explanations for the following terms:
$(1)$ Malpighian body
$(2)$ Sebaceous gland

Name the following:
Cortical portions projecting between the medullary pyramids in the human kidney.

The diagram of a nephron is given below. Which of the following structures together form the renal corpuscle (Malpighian body)?