Thermodynamics: Reduction Potential question

[TytoAlba95]

Homework Statement

NA

Relevant Equations

NA

The answer key says the correct option should be a, but I think it should be b. Because Y has a reduction potential same as the element B.

An element is a good reducing agent only if its reduction potential is negative or less positive.

 

[mjc123]

Then why have you chosen the most positive one?

The question seems unclear. What are you being asked to do - reduce B or oxidise BH₂? I read it as reducing B, but then you want an electron donor, not an acceptor. Have I misunderstood?

 

[TytoAlba95]

I think it is asking which out of the three can oxidize BH2. In that case, I think (b) is the correct option.
Thanks for pointing out, I got confused after reading the question. I really is unclear.

But if they are asking for the oxidant, shouldn't Y element be excluded?