HELP: Capital Losses Surrender

Hello, I will really appreciate if someone can help me with the following query

So, I was doing CACAO LTD Group question (Kaplan Exam Kit) in that

1) 3 companies are 100% owned by an other company.
2) One company (A) had a capital loss brought forward where as another company (B) had capital gain in the year.

Now in the solution, examiner transferred capital gain of B to A to adjust its capital loss.

Now my query is,
1) cant we transfer capital loss of A to B to adjust it?
2) Are brought forward capital losses transferred for relief in capital gain group?

Would really appreciate this help as I am a self-study student.