To form NADPH from NADP+, you need two electrons and one proton (hydrogen ion). Therefore, the correct response is:
two electrons and a hydrogen ion.
However, since NADPH is produced from NADP+ and requires the reduction process, it is often simplified to requiring a specific number of electrons and protons. In a more complete context, it typically involves combining NADP+ with the electrons from Photosystem I and protons (H+) to convert NADP+ into NADPH.