Which statement is correct? Statement A: DDL is the language used to define the logical data model,

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Which statement is correct? Statement A: DDL is the language used to define the logical data model, but no other data models. Statement B: SQL is a DML language to retrieve, insert, delete, and modify data. It is stored in the catalog. 

a. Only A. 

b. Only B. 

c. A and B. 

d. Neither A nor B.

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