First of all, answers are D and A respectively, correct? My understanding is that for AMT purposes, you are not allowed any taxes, medical expenses under the threshold, miscellaneous expenses under the threshold or home mortgage interest paid on a home mortgage loan used for anything other than the acquisition or improvement of a qualified personal residence (someone correct me if I'm wrong or missing anything!). So for your first question, you are allowed the following:
$2,000 medical expenses (the amount paid that is above the 10% threshold)
$10,000 qualified home mortgage interest (the interest paid on a loan used to pay off personal debt is not an allowable deduction)
$5,000 charitable contributions
Your second question, you are allowed both deductions. The home mortgage interest was used to acquire a principal residence, and is thus allowable.
Does that make sense? I'm not 100% sure on the miscellaneous deductions, so if I'm wrong there I apologize.