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B
Nucleus
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C
Mitochondria
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D
Chloroplast
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Solution
The correct option is A Ribosomes The nucleus is a house for chromosomal DNA, also called as nuclear DNA. Mitochondria and chloroplast are semiautonomous organelles that have single-stranded circular DNA. The ribosome is an assemblage of ribosomal RNA and ribosomal protein but does not contain its own DNA.