Columns of Bertini in the kidneys of mammals are formed as extensions of
Cortex in medulla
Cortex in pelvis
Medulla in pelvis
Pelvis in ureter
The correct option is A Cortex in medulla The column of Bertini, also known as the renal column is a medullary extension of the renal cortex in between the renal pyramids. It allows the cortex to be better anchored. Each column consists of lines of blood vessels and urinary tubes and a fibrous material.