[mr_moh55555]

المشاركة الأصلية كتبت بواسطة MAZEN gamal

The first one (whom)
but the second sentence we choose (that) because it is superlative
mokarna men eldrga al talta (the most )sorry for writing like this as there is a problem to write in Arabic )

Both "who" and "that" are possible in this sentence

بص يا مستر...who صح...that صح و الاحسن حذف الاثنين من الجملة

He is the most intelligent boy I have ever seen.