Which membrane is highly convoluted?

A. chloroplast inner membrane

B. mitochondrial inner membrane

C. the chloroplast outer membrane

D. both the mitochondrial and chloroplast inner membranes

The correct option is B.

Mitochondria is one of the membrane bound organelles that is found in living cells. It is called the power house of the cell because it is responsible for providing energy for the life sustaining activities of the cells. Mitochondria possesses an outer membrane and a highly convoluted inner membranes. The convoluted portion of the mitochondria provides a large surface area for the occurrence of biochemical reactions

The right choice would be B. Mitochondria inner membrane. They are usually complicated to develop surface areas.