A small fragment of a human gene has the nucleotide sequence 5-CGATCCTC-3. What hybridization probe sequence may be used to search for this gene in the library?

• A. 5-CGATCCTC-3
• B. 3-GCTAGGAG-5
• C. 3-GCTTTGAG-5
• D. 5-CCATGGTC-3

Answer: (B)