A. GA TC
B. GU AG
C. AG TA
D. GA AT
I have been asked this question in unit test.
This interesting question is from Post-Transcriptional Modification in chapter Gene Expression : Transcription Prokaryotes of Cytogenetics
The best explanation: The 5’ end of the splice site has the sequence GU, the 3’ end has the sequence AG. These help to locate the intron but more determining factors exist.