The correct answer is: A. from negative to positive.
Conventional current flow is the flow of positive charge. It is the direction in which current is conventionally assumed to flow in an electric circuit. This is opposite to the direction of electron flow, which is the actual flow of charge in a conductor.
The direction of conventional current flow was chosen because it is consistent with the direction of the magnetic field produced by a current. The magnetic field produced by a current always circles around the current in a clockwise direction, when viewed from the positive end of the current. This is called the right-hand rule.
The direction of conventional current flow is also consistent with the direction of the electric field produced by a voltage difference. The electric field produced by a voltage difference always points from the positive terminal of the voltage source
to the negative terminal.Option B is incorrect because the direction of electron flow is from positive to negative.
Option C is incorrect because there is no such thing as “left to right” current flow. Current flows in a circuit, not in a straight line.
Option D is incorrect because neutral is not a terminal in a circuit. The terminals in a circuit are the positive and negative terminals of the voltage source.
Option E is incorrect because the direction of conventional current flow is from negative to positive.