Showing Mother's Name in the Child's Page

Hi everyone.
Do you know how to show mother category's name in the child category's page?
I mean, for example I have sth like this:
Cat A
---SubCat B

---

SubCatC

in B page, you have subcategories and their item counts. sth like this:
B
subcategories:C(2/4)
Now I want to know how to show A's name in B's page? Better in the top of B in it's page. sth like this:
A->B
subcategories:C(2/4)

I hope you'll get what I meant.
Do I have to change sth in alpha_category.php?

Thanks