Hot working : The process of metal hot working constitutes plastic deformation under high temperature (above the recrystallization point of metal). The re-crystallization occurs simultaneously along with the deformation during hot working of metals.

Recrystallization is the phenomenon occurred at sufficiently higher temperatures, where the growth of new grains in the metal structure, is accelerated and resulting metal comprises entirely of only new grains.

Note : Recrystallization of different metals

Hence, the correct option is (A).