Suratul fatihah is referred to as fatihatul kitab because it

A.

the mother of the book

B.

contains seven oft-repeated verses

C.

begins the Qur'an

D.

summarizes the Qur'an

Correct answer is C

Suratul Fatiha is referred to as Fatihatul Kitab because it begins the Quran.
Fatihatul Kitab The very first Surah of the Quran which consists of seven verses is called Surah Fatiha or Fatihatul Kitab, meaning the opening of the book.