The answer is (b). As, vanadium is attached to five fluoride atoms, each flouride containing -1 oxidation state, hence five fluoride contains -5, to neutralize, vanadium should have +5 oxidation state.
I believe it’s active transport hope it helps:)
It’s is c, if you oook it’s the only clear answer
Answer: Well, the energy can flow from a colder to a hotter object. There is no physical law that forbids it. So there is no law that forces the heat to go from a hot to a cold body, it is just that it is much more likely for that to happen.
Explanation: