When a voltage is applied to an intrinsic semiconductor

When a voltage is applied to an intrinsic semiconductor which is at room temperature—

1. Electrons move to the positive terminal and holes move to the negative terminal.
2. Holes move to the positive terminal and electrons move to the negative terminal.
3. Both holes and electrons move to the positive terminal.
4. Both holes and electrons move to the negative terminal.

When a voltage is applied to an intrinsic semiconductor, electrons move to positive terminal and holes move to the negative terminal.