Question 10 of 25 According to the U.S. Food Drug, and Cosmétic Act a patch test should be performed __ before each application of haircolor formulated with aniline derivative dyes. Select the correct response: 24 to 48 hours eight to ten hours four to five hours 48 to 72 hours

## Step 1<br />The problem is about the U.S. Food Drug, and Cosmétic Act, which is a federal law in the United States. This law regulates the manufacture, distribution, and sale of cosmetics and drugs in the country.<br />## Step 2<br />The question is asking about the time frame within which a patch test should be performed before each application of hair color formulated with aniline derivative dyes.<br />## Step 3<br />The options provided are: 24 to 48 hours, eight to ten hours, four to five hours, and 48 to 72 hours.<br />## Step 4<br />According to the U.S. Food Drug, and Cosmétic Act, a patch test should be performed 24 to 48 hours before each application of hair color formulated with aniline derivative dyes.