Which series of labels correctly identifies the indicated structures in this sketch of a cell viewed under a microscope?
a [a. mitochondrion b. nucleus c. golgi d. endoplasmic reticulum e. lysosome f. vesicle]

b [a. golgi apparatus b. nucleolus c. endoplasmic reticulum d. mitochondrion e. ribosome f. lysosome]

c [a. mitochondrion b. nucleolus c. golgi apparatus d. chromatin e. ribosome f. lysosome]

d [a. endoplasmic reticulum b. nucleus c. golgi apparatus d. mitochondrion e. vesicle f. ribosome]