What is the name of the graduate chapter mentioned?

The correct answer is B, Pi Nu Omega, as it is specifically recognized as a graduate chapter of Alpha Kappa Alpha Sorority, Inc. Graduate chapters are formed to continue providing services and programming to the community while facilitating the involvement of those who have already completed their collegiate education. Each graduate chapter plays a vital role in furthering the mission of the sorority, focusing on sisterhood and community service.

The other names listed represent different organizations or chapters that do not pertain to the context of the question regarding Alpha Kappa Alpha's graduate chapters. Omega Psi Phi and Delta Sigma Theta are separate fraternities and sororities, respectively, while Alpha Tau Omega is also a fraternity that does not relate to the graduate chapters of Alpha Kappa Alpha. Therefore, recognizing Pi Nu Omega as the graduate chapter aligns with the focus and objectives of Alpha Kappa Alpha's mission and structure.