Which Option Should I Choose for the Complex Ion Based on the Given Information?

[TT0]

Homework Statement

Homework Equations

The Attempt at a Solution

There is 0.2 mol of Cl^- ions so therefore this leaves us with a 1:1 ratio for the chloride ion to chromium ion in the complex ion. This leaves us with option B or D. However, I am not sure how to choose between them. Can someone give me some advice?

Cheers!

 

[Borek]

I don't think there is enough information to choose between the two here.