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The ribosomes are produced in:
a. Nucleolus
b. Cytoplasm
c. Mitochondria
d. Golgi body

Answer
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Hint: The ribosomes are the cell organelles that help in the synthesis of proteins. The ribosomes and the molecules which are associated with them are also identified as the translational apparatus.

Complete answer:.
The ribosomes present in the Eukaryotes are generated and assembled in the nucleolus. Thus, we can say that the nucleolus is a cell organelle that is responsible for the production of ribosomes.
The cell organelle nucleolus is known to be the largest structure present in the nucleus of eukaryotic cells where it principally obliges as the site of ribosome synthesis and assemblage.
The proteins of ribosomes enter the nucleus and ought to combine with the four strands of rRNA to create the two ribosomal subunits (in which one of them is small and the other one is large), which together make up the complete organelle of the ribosome.
Through the nuclear pores, the ribosome units leave the nucleus. Also, they unite once in the cytoplasm of the cell for the persistence of protein synthesis.

So, the correct answer is A.

Additional Information: The small and large ribosomal subunits are present in ribosomes. Every subunit of the ribosome consists of one or more molecules of ribosomal RNA (rRNA) and many more ribosomal proteins (just like RPs or r-proteins).

Note: The cell organ nucleolus which is present in the nucleus also has other imperative roles like the assemblage of indication and recognition particles. It also involves playing a role in the cell's rejoinder to stress. Proteins and RNA made the ribosomes.