The correct answer is Partition key and row key.

Partition key and row key together form the composite primary key for an entity in table storage. The partition key groups related entities and helps distribute data across storage nodes while the row key uniquely identifies an entity within that partition. Together they allow the service to locate an entity efficiently by first narrowing to a partition and then finding the row inside it.

Project ID and table ID is incorrect because table services do not use a project identifier and table identifier as a composite lookup key to identify a single entity. The project concept applies to other platforms and it does not provide the per entity uniqueness that the partition and row keys provide.

Private key and public key is incorrect because those terms refer to cryptographic keys used for authentication and encryption and they are not used as storage keys to locate entities in a table.

Table name and column name is incorrect because the table name only identifies the table and a column name is a schema attribute. A column name does not uniquely identify an entity and it is not used as the composite storage key for entity lookup.

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