Which major key has 4 sharps?

E Major is the correct answer because it is the major key that contains four sharps in its key signature. In musical notation, the sharps are placed on the F, C, G, and D notes within this key. The sequence of sharps in key signatures follows a specific order, which begins with F and continues through C, G, D, and A, resulting in four sharps for E Major.

Understanding key signatures is crucial for identifying the tonal center of a piece of music. Each major key has a unique configuration of sharps or flats that defines its sound and character. In contrast, the other choices presented each have a different number of sharps or flats: A Major contains three sharps, G Major has one sharp, and C Major has no sharps or flats at all. Recognizing these differences is key to mastering music theory and the relationships between different keys.