Complex sentence: She has written 125 novels, most of which first appeared serialized in magazines like "Kumudam" and "Aval Vikatan" and were later brought out in book format by Arunodhayam.
Split into simpler sentences: She has written 125 novels, which first appear serialized in magazines like "Kumudam" and "Aval Vikatan". They are later brought out in book format by Arunodhayam.