Because of the way the fda reviews and approves otc drugs,
a. each different brand is required to contain unique ingredients.
b. various brands of a given type of remedy usually contain the same few active ingredients.
c. each type of drug is limited to only a single active ingredient.
d. it is impossible to tell from the label what each product's active ingredients really are.

The correct answer is option.

Explanation:

FDA or food and drug association is the association that control and regulate the drugs and foods before reaching in market. It is also test the drug if it complete all the norms and regulation.

Most of the various brands of drugs for a particular remedy is generally have similar active ingredients. Major reason is of most of over the counter have similar active ingredients.

Thus, the correct answer is option b.

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