5a. For 2020, the threshold amount for the deductibility of allowable medical expenses ordinarily is: 10% of taxable income. 10% of AGI. 7.5% of AGI 15% of taxable income c) d) 5b. a) What is the maximum amount of personal residence acquisition debt on which interest is fully deductible on Schedule A? $1,000,000 $250,000 $750,000 $0