Step 1: Define DBMS language.
A Database Management System (DBMS) language is a specialized language used to define, manipulate, and control the data in a database.
Step 2: Analyze the options.
(A) C, (C) Java, and (D) C++ are general-purpose programming languages.
(B) SQL (Structured Query Language) is the standard language specifically designed for managing and querying relational databases. It is the quintessential DBMS language.
Therefore, SQL is the DBMS language among the choices.