Step 1: Understanding the Concept
The anticodon is a triplet on the anticodon loop of tRNA.
Step 2: Base pairing
During translation the anticodon pairs with the matching codon on messenger RNA, bringing the correct amino acid.
The codon itself is a copy of the DNA template.
Step 3: Why the other options fail
The anticodon does not pair directly with DNA or rRNA, and a tRNA does not pair with its own sequence.
Final Answer:
The anticodon is complementary to the sequence on mRNA.
\[ \boxed{\text{(C) }\text{mRNA}} \]