Q. The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are :
A. Stroma
B. Cristae
C. Grana
D. Stroma lamellae

Q. The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are :
A. Stroma
B. Cristae
C. Grana
D. Stroma lamellae