Answer:
The correct mRNA strand is b. UCCAUGCAUGAGUAC.
This is because in transcription, the DNA strand is used as a template to create a complementary RNA strand. The process is called transcription, and the enzyme that carries out this process is called RNA polymerase. During transcription, the enzyme reads the DNA sequence in the 3' to 5' direction, and it synthesizes a complementary RNA strand in the 5' to 3' direction. In the process of transcription, Adenine (A) in the DNA strand pairs with Uracil (U) in the RNA strand, Cytosine (C) in the DNA strand pairs with Guanine (G) in the RNA strand, and vice versa. So the strand AGGTACGTACTCATG, when transcribed, will result in the complementary strand UCCAUGCAUGAGUAC.