To refer to two shirts, the correct choice would be:
- First drop down: dos (for "two")
- Second drop down: camisas (but note you wrote "camissa" which seems to be a typo—it should be "camisas" for the plural of "shirt")
So the complete sentence would be "dos camisas" (two shirts).
If you're limited by the provided options, the answer is:
dos and camissa.