Which amendment prohibits denying the right to vote on account of sex?

• A. Fifteenth Amendment (1870)
• B. Nineteenth Amendment (1920)
• C. Twenty-Fourth Amendment (1964)
• D. Twenty-Sixth Amendment (1971)

Answer: (B)

The essential idea is protecting voting rights from gender-based discrimination. The Nineteenth Amendment, ratified in 1920, states that the right to vote cannot be denied or abridged by the United States or by any state on account of sex. This explicitly guarantees women the right to vote nationwide, following a long suffrage movement.

Context helps: before this amendment, some states allowed women to vote while others did not. After, voting rights for women were standardized across the country. Other amendments address different voting barriers—such as race (Fifteenth), poll taxes (Twenty-Fourth), or lowering the voting age (Twenty-Sixth)—but they do not address sex-based exclusion.