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The genetic material of a virus typically consists of:

  1. DNA

  2. RNA

  3. Both DNA and RNA

  4. Neither DNA nor RNA

The correct answer is: Both DNA and RNA

Viral genetic material can consist of DNA, RNA, or both. Option A and B are incorrect because both DNA and RNA have been found as the genetic material of different viruses. Option D is incorrect because viruses have genetic material, it may not be DNA or RNA but it can be other genetic materials. Therefore, the best answer is C as it includes both possibilities, which have been observed in different viruses.