Which of the Following Is True Regarding Hypersensitivity Reactions

question 60

Multiple Choice

Which of the following is true regarding hypersensitivity reactions?

• A) They usually occur from first-time exposure to an antigen.
• B) There are four types (I-IV) of sensitivity reactions.
• C) They can occur without exposure to an antigen.
• D) Both a and b are correct.

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Definitions:

Break-even Price

The market price at which the costs of production equal the revenues for a product, resulting in no net loss or gain.

Selling Price

The purchase price is the sum a consumer spends to obtain goods or services from a vendor.

Markdown

A reduction from the original or list price of a product or service to increase its attractiveness to buyers.

Motorcycle

A two-wheeled motor vehicle that is faster and more fuel-efficient than a car, used for transportation, recreation, and sports.