Concept:The intersection of two sets contains only the elements that appear in both sets.Explanation:First, list all integers satisfying 1<p<20.P={2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}.Next, list all multiples of 4 from 0 to 25 inclusive.R={0,4,8,12,16,20,24}.Now, identify the elements common to both sets.The multiples of 4 that are also in P are 4,8,12, and 16.20 is not in P because p<20.0 and 24 are not in P because p>1.Therefore, P∩R={4,8,12,16}.Answer:{4,8,12,16}Option B.