The damage done to diseased or damaged tissues by the photosensitizing agent aminolevulinic acid (ALA) is a result of:
A) ALA producing oxygen radicals in tissues
B) protoporphyrin IX converting into ALA which produces oxygen radicals in tissues
C) ALA converting into protoporphyrin IX which produces oxygen radicals in tissues
D) ALA producing high energy electrons which damage tissues at a distance
Correct Answer:
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