What is the main purpose of Isma-ur-Rijal?

اسما ار ریجل کا بنیادی مقصد کیا ہے؟

For authenticity of Transmitters

For authenticity of Ahadis

For authenticity of History of Sahaba

None of these

Ilm al-Isma-ur-Rijal is the science of the biographies of Hadith transmitters.

Its main purpose is to verify the trustworthiness, memory, and character of narrators in Hadith chains.