Final answer:
The template DNA strand for the given RNA sequence GAGC is C) CTCG. Hence, option C) is correct.
Step-by-step explanation:
The template DNA strand for the given RNA sequence GAGC is option C, CTCG.
In DNA replication, the RNA strand serves as a template for the synthesis of a complementary DNA strand. The complementary base pairs in DNA are A-T and G-C. So, using this information, we can determine the complementary sequence for the RNA strand GAGC as the DNA strand CTCG.