Which of the following make up a chromatic scale?

A chromatic scale consists of all 12 notes of an octave, including the natural notes (C, D, E, F, G, A, B) and the sharp/flat notes in between each of those natural notes.

The correct notes in a chromatic scale are: C, C#/Db, D, D#/Eb, E, F, F#/Gb, G, G#/Ab, A, A#/Bb, B.

whole steps

A chromatic scale consists of 12 pitches that are a half step apart. A half step is the smallest distance between two notes in western music.

A whole step consists of two half steps. So while whole steps are part of a chromatic scale, they do not make up the entire scale.