Nathan had an infection, and his doctor wanted him to take penicillin. because nathanís father and paternal grandfather were allergic to penicillin, nathan has a 75% chance of having the same allergy. the doctor performed a skin test to see whether nathan would react to it. the test is 98% accurate. what is the probability that nathan is not allergic to penicillin and the test predicts it?

a. 0.005

b. 0.015

c. 0.245

d. 0.735