If instead of electrons, the antiparticle of electron, positron is made to flow as the charge carrier. What will happen to the current through the conductor? ( Hint : An antiparticle differs from its particle in the polarity of charge. Other properties such as mass, magnitude of charge, etc remain the same.)

It will flow in opposite direction.

If the current due to electrons is in a particular direction, that due to its antiparticle is in the opposite direction.