While not a hard-and-fast rule, molecules may be ranked from more immunogenic to less immunogenic. Which shows the correct ranking form more immunogenic to less immunogenic?
A) proteins > polysaccharides > lipids > haptens
B) haptens > proteins > lipids > polysaccharides
C) haptens > lipids > polysaccharides > proteins
D) polysaccharides > lipids > proteins > haptens
E) Only haptens are less immunogenic; lipids, polysaccharides, and proteins have about equal immunogenicity.
Answer: A
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