The science of Asma al-rijal is introduced in order to
Authenticate the chains of Hadith narrators
Confirms the names of Hadith books
Ascertain the number of a hadith
Explain the contents of the sunnah
Correct answer is A
This refers to study of men and women who transmitted hadith reports. This discipline was necessary to develop as an aid to another Hadith discipline called Al-Jarh wa al-Ta`dil.