Correct Answer: B
Explanation:
: (B) In RNA, thymine is replaced by uracil, so the correct choice is (B), where DNA adenine is said to bond to an RNA thymine. All the other choices are incorrect, including the DNA guanine to an RNA cytosine. The test maker may depend on the student vaguely remembering that a certain base-pairing between DNA and RNA is not possible and may choose choice (C) as being correct. This is not the case.