The correct option is C Thylakoid membranes
Chlorophyll
is a photosynthetic pigment. Photosynthetic pigments have the ability to trap
sun energy and use this energy for photosynthesis. Chloroplasts are greenish
plastids which possess photosynthetic pigments, chlorophylls and carotenoids
and take part in the synthesis of food. Chloroplasts are double-membrane bound
organelle having outer and inner membrane. The inner membrane is relatively
less permeable to substances than outer membrane and thus, has more proteins
including carrier proteins. The space enclosed by the inner membrane of the
chloroplast is called stroma. Stroma contains a large number of organised
flattened membranous sacs called thylakoids. Chlorophyll occurs in thylakoid
membrane. Since they take part in photosynthesis; they are also called
photosynthetic thylakoids. Thylakoids are thus the structural elements of the
chloroplast. They generally run parallel but may show interconnections.