Complex sentence: His son Samir Thapar runs JCT Mills and JCT Limited and his son Arjun Thapar runs JCT electronics.
Split into simpler sentences: His son Samir Thapar runs JCT Mills and JCT Limited. Because of Samir Thapar, Jct is at its best.Son Arjun Thapar runs JCT electronics.