Multiple Choice
Which of the following are antigens? 1. toxins
2) chemicals
3) foreign particles (for example, splinters)
4) drugs
A) 1, 2, and 3 only
B) 2 and 3 only
C) 1 and 4 only
D) 1, 2, 3, 4
Correct Answer:
Verified
Correct Answer:
Verified
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