stock selections


I have a final round interview coming up for a small investment firm. As part of the final round i need to prepare a pitch on two stocks one to long and one to short and I’m struggling to come up with a really good pair.
I had a few stocks in mind but I am thinning of going market neutral and was wondering if anybody had any strong opinions on a pair of stocks where they see an opportunity for alpha extraction.

Oh I should have said their is no fixed time frame for the investment and both stocks have to be FTSE 100.