Step 1: Recall Egyptian rulers and monuments.
Khufu and Khafre were pharaohs of Egypt known for building great pyramids at Giza.
The Temple of Karnak, located in Luxor, is one of the largest temple complexes built by Egyptians.
Step 2: Analyze each element.
(A) Khufu: Correct. Builder of the Great Pyramid of Giza.
(B) Khafre: Correct. Builder of the second pyramid and associated with the Sphinx.
(C) Temple of Karnak: Correct. A vast religious complex dedicated to Amun and other gods.
(D) Tigris: Incorrect. The Tigris is a river associated with Mesopotamian civilization, not Egypt.
Step 3: Elimination.
Any option including D (Tigris) is wrong. Therefore, (A) and (C) are eliminated.
Step 4: Conclusion.
The correct answer is (B) A, B and C only.