Explanation

Sahih Bukhari is widely regarded as the most authentic book of Hadith literature. Musnad compiled hadiths based on narrators without strict thematic ordering. Sahifah e Saadiqah is not generally recognized as the standard definitive source for all hadith. Mishkaat Sharif is a collection of sayings, but it is not considered the primary 'most authentic' compilation like Sahih Bukhari.