Answer:
The answer to your question is: b. plasma membrane
Step-by-step explanation:
a. endoplasmic reticulum there are two kinds of endoplasmic reticulum, smooth and rough, rough endoplasmic reticulum has ribosomes integrated, while smooth endoplasmic reticulum does not have them.
b. plasma membrane this organelle has proteins integrated in its structure but it does not have ribosomes. This is option is correct.
c. cytoplasm It is possible to find some ribosome in the cytoplasm so this option is wrong.
d. nuclear envelope Ribosomes participated in the synthesis of proteins and part of this process happens in the nucleus, so this answer is wrong.