Match the following CORRECTLY with respect to databases:

1. Networked DBMS	A. Data retrieved by unique keys; relationships expressed through matching keys.
2. RDBMS	B. Store objects and operations to be performed on data; Applications interact with object managers which work through object servers to gain access to object stores.
3. ODBMS	C. Looks like several trees that share branches; children have multiple parents and parents have multiple children.
4. ORDBMS	D. Primarily a relational structure with object-oriented features included.

Correct option is D

1. Network Model: Graph-like; supports many-to-many relationships directly through set/member links.
2. Relational Model: Tables + keys; integrity via primary/foreign keys; joins express relationships.
3. Object DBMS: Persists objects with identity, encapsulation, and navigation by object references.
4. Object-Relational: Relational core with OO extensions—UDTs, table functions, inheritance, and methods.
5. Query Styles: RDBMS/ORDBMS typically use SQL; ODBMS often uses navigational/object query languages (e.g., OQL).
6. Use Cases: Network/ODBMS favor complex, pointer-rich models; RDBMS excel at set-based querying; ORDBMS bridges both.