Final answer:
The symbol for Zeta Phi Beta Sorority, Inc. is not listed among the given options, as it is a unique organization with its own identity.
Step-by-step explanation:
The symbol for Zeta Phi Beta Sorority, Inc. is not any of the provided Greek letter organizations. Instead, Zeta Phi Beta Sorority, Inc. is a distinct organization with its own symbols and identity. The options listed (Alpha Kappa Alpha, Delta Sigma Theta, Sigma Gamma Rho, and Phi Beta Sigma) are separate Greek letter organizations. Specifically, Phi Beta Sigma is historically the brother fraternity to Zeta Phi Beta Sorority, Inc., often referred to as its 'constitutional bond' within the National Pan-Hellenic Council which indicates a very close relationship between the two. The question seems to be asking for the symbol of the sorority itself, which would be its own unique symbol, not the symbols of other organizations.