Proteins are
a) built in the nucleus by DNA and transported to the ribosomes.
b)converted from nucleic acids to amino acids in the nucleolus.
c)produced in the lysosomes and transported out of the cell by vacuoles.
d)transported to other parts of the cell by the endoplasmic reticulum from ribosomes.

I say D because ribosomes make proteins and the endoplasmic reticulum does transport things around the cell

Explanation:

a is not it because as i said proteins are made in the ribosomes not the nucleus

c is not it because lysosomes get rid of any unwanted germs bacteria or viruses that enter the cell

b is not it because well um im not sure but i know the nucleus does not convert nucleic acid to amino acids

so the correct answer is definitly D

if brainiest is earned its Greatly Appreciated.

answer; polycythemia is the correct answer;