Refer to the given figure and identify the parts labelled P,Q,R and S.
A. `{:(P,Q,R,S),("Seed","Thalamus","Mesocarp","Endocarp"):}`
B. `{:(P,Q,R,S),("Thalamus","Seed","Endocarp","Mesocarp"):}`
C. `{:(P,Q,R,S),("Seed","Thalamus","Endocarp","Mesocarp"):}`
D. `{:(P,Q,R,S),("Pericap","Seed","Mesocarp","Endocarp"):}`