Which statement is are correct

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Which statement is/are correct?

A. The Hierarchical Database Model (HDBM) is applicable when the data in an organisation can be put down in the hierarchical or in terms of the levels, one after another

B. The data model is shown by an arrangement of the blocks

C. The Network Database Model (NDBM) deals with the set and the records

D. All of the above

Answer: Option D

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