Final answer:
Tc is left in the valence state of +7 in sestamibi.
Step-by-step explanation:
The valence state of +7 refers to the oxidation state of the element technetium (Tc). Among the options provided, the compound that contains Tc in the +7 oxidation state is sestamibi. In sestamibi, Tc is present as the TcO4- ion, where it has an oxidation state of +7. Sestamibi is commonly used in nuclear medicine for cardiac imaging.