Observe the given figure carefully and fill in the blanks by choosing the correct option .
A. `{:("(p)","(q)","(r)"),("Perfect crystal","p-type semiconductor","n-type semiconductor") :}`
B. `{:("(p)","(q)","(r)"),("Doped crystal","n-type semiconductor","p-type semiconductor") :}`
C. `{:("(p)","(q)","(r)"),("Perfect crystal","n-type semiconductor","p-type semiconductor") :}`
D. `{:("(p)","(q)","(r)"),("n-type semiconductor","Perfect crystal ","p-type semiconductor") :}`
