A note half tone lower to 'A' will be
A
Correct answer
Explanation
A note half tone (semitone) lower than A is A flat (Ab), which is enharmonically equivalent to G sharp (G#). In music theory, A♭ and G# represent the same pitch. The question's phrasing 'half tone lower' would typically indicate A flat, making G# (option A) the correct choice as an enharmonic equivalent.