Which suraths are starting in iktharab?

The Surahs that begin with the letter "Ikhtilaf" (or "Ikhtarab") are Surah Al-Muddathir (74) and Surah Al-Insan (76). Both of these Surahs address themes of guidance, accountability, and the consequences of one's actions. If you meant a different term or specific context, please clarify for a more accurate response.