Which of the following is a correct statement about viruses?

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Viruses are non-living outside a host cell and must hijack a host's cellular machinery to replicate, making them obligate intracellular parasites. They contain either DNA or RNA, not both (except some rare cases). They lack cell walls and metabolic machinery. Their status as living or non-living is debated, but they are biologically active only inside a host.

Which of the following is a correct statement about viruses? MCQ with Answer and Explanation

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