The correct option is D Cristae
Cristae are foldings present on the inner membrane of mitochondria. These foldings increase surface area and help in production of ATP.
Thylakoid, DNA and grana are present in chloroplasts. The single, green, coin like structures stacked on top of each other in a chloroplast are called thylakoids. The entire stack of thylakoid is called grana. DNA is the genetic material present inside chloroplasts.