Explanation: There are three pyramids in Giza; Khufu (which is the biggest one of them), Khafre (the middle), and Menkaure (the smallest). Narmer was an ancient Egyptian king of the Early Dynastic Period, circa 3150 to 3100 BC. He was probably the successor to king Ka, or possibly Scorpion. Some consider him the unifier of Egypt and founder of the First Dynasty, and in turn the first king of a unified Egypt.
A trombone is a brass instrument, thus a member of the bass section. The same applies to the oboe except with woodwinds. That only leaves strings, percussion, woodwinds, and brass.
