For the Following Entity-Relationship Diagram, What Could the Primary Key

question 98

Multiple Choice

For the following entity-relationship diagram, what could the primary key be in the Grade entity?

• A)Primary key in Student entity
• B)Primary key in Course entity
• C)Its own primary key.
• D)Primary key made up of the primary keys in Student entity and Course entity
• E)It doesn't need a primary key.

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Definitions:

Cell Membrane

The semipermeable membrane surrounding the cytoplasm of a cell, which regulates the movement of substances in and out of the cell.

Cytoplasm

The material within a living cell, excluding the nucleus, that contains the organelles and facilitates cellular processes.

Nucleus

The organelle in a cell that contains the majority of the cell's genetic material (DNA/RNA).

Cardiac

Pertaining to the heart.