In any case, may one drive with a front fog light along with the position light and without using the low-beam or dipped headlight?

A)No, to drive one must always use the position light along with the dipped headlight.
B)Yes, when driving during the day with fog, it is not necessary to use the low-beam light together with the position light and fog light.Correct
C)Yes, both day and night.
During the day and with fog or circumstances foreseen by law, one can drive with the position light along with the front fog light. If driving from sunset to sunrise, the low-beam or dipped headlight must be used along with the position light.
FRONT FOG LIGHT:
- Its installation and use is NOT mandatory.
- It will be white or selective yellow.
- It will be used voluntarily, in the case of fog, heavy rain, snowfall, smoke or dust clouds, or in similar circumstances.
- It can also be used on narrow roads with many curves, that is, those that, having a 6.5 m wide carriageway or less, are signaled with "dangerous curves" signs. The front fog light, during the day, may be on only with the position light, but may also be used together with the low or high beam. At night, it will be used at minimum with the low beam.
FRONT FOG LIGHT:
- Its installation and use is NOT mandatory.
- It will be white or selective yellow.
- It will be used voluntarily, in the case of fog, heavy rain, snowfall, smoke or dust clouds, or in similar circumstances.
- It can also be used on narrow roads with many curves, that is, those that, having a 6.5 m wide carriageway or less, are signaled with "dangerous curves" signs. The front fog light, during the day, may be on only with the position light, but may also be used together with the low or high beam. At night, it will be used at minimum with the low beam.