Final answer:
A conduit body with a 90 degree connector and the cover on the left is known as a Type LB, which is used for making a 90-degree directional change in conduit runs. None of the given options are correct.
Step-by-step explanation:
A type of conduit body with a 90 degree connector and the cover on the left is a Type LB. Conduit bodies are components used in an electrical conduit system to provide access for inspection, pulling, and maintenance of the wires. Considering the description given, with a 90 degree bend and the cover being on the left, this arrangement describes a Type LB conduit body. The different types of conduit bodies are designated by letters, and each letter represents a different shape and intended use. In this case, Type LB is used to change the direction of conduit and wires in a 90-degree turn, typically when the conduit is coming out of a wall or similar surface.
None of the given options are correct.