Match the columns and identify the correct option
`{:("Column -I ","Column-II"),("Thylakoids","(i) Disc-shaped sacs in golgi appartus"),("Cristae","(ii) Condensed structure of DNA"),("Cisternae","(iii) Flat membranous sacs in stroma"),("Chromatin","(iv) Infoldings in mitochondria"):}`
A. a-iv,b-iii,c-I,d-ii
B. a-iii,b-iv,c-I,d-ii
C. a-iii,b-I,c-iv,d-ii
D. a-iii,b-iv,c-ii,d-i
