Certain U.S. government securities are considered exempt securities under federal securities laws, meaning they are exempt from registration requirements that apply to many other public offerings. That is why zero-coupon U.S. government obligations (such as STRIPS and other Treasury-derived zero-coupon instruments) are classified as exempt securities due to exemption from registration, making answer B correct.

It’s important to separate “exempt from registration” from other common investor risks. Choice A is incorrect because being a U.S. government obligation does not mean the security is “exempt from credit risk” as a legal classification; rather, investors generally view U.S. Treasury obligations as having very low credit risk because they are backed by the U.S. government. That market perception is not the legal basis for the “exempt security” label. Choice C is incorrect because zero-coupon bonds can have substantial interest-rate risk—often more than comparable coupon-paying bonds—because their duration is typically higher (no periodic interest payments), making them more price-sensitive to rate changes. Choice D is incorrect because Treasury interest is generally subject to federal income tax (though often exempt from state/local tax). Zero-coupon Treasuries also raise tax considerations due to “imputed interest” (original issue discount accretion), but none of that makes them federally tax-exempt.

The SIE tests that “exempt securities” refers to registration exemptions, not “risk-free” or “tax-free.” You should associate U.S. government securities with exemption from Securities Act registration requirements, while still recognizing they carry market risks like interest-rate risk.