In non-ferromagnetic materials, most of the electrons are
paired and spinning in opposite directions
paired and spinning in the same direction
unpaired and spinning in opposite directions
not spinning

The correct answer is " paired and spinning in opposite direction.

Explanation:

Non ferromagnetic materials are the materials that are non-magnetic. They contain no iron ( ferrous). The electrons are paired in non ferromagnetic materials.

The electrons in a pair spin in opposite direction. Then, the magnetic fields will get cancel each other. There will be no magnetic field exist.

In non-ferromagnetic materials, most of the electrons are paired and spinning in opposite directions.

Ferromagnetic materials are the materials that are magnetic. They are able to create permanent magnets. They contain unpaired electrons.

Therefore, in non-ferromagnetic materials, most of the electrons paired and spinning in opposite direction.

no sign of dia of fuel cell

it has to be b, about 97 percent.