Since there are 28 days in a regular February and 365 days in a total year, the probability that a random person is born in February is 28/365. This means that the probability that they were NOT born in February is 337/365, or answer choice A. Hope this helps!
I think across from each other is more direct. You could say two angles that are on opposite ends of a diagonal. That is probably clearest of all, now that I think of it.