Answer:
4th I believe. Wish you good luck.
Many scales are diatonic including Major, Minor (the Harmonic minor is an exception) and modal scales. Examples of non-diatonic scale are pentatonic, octatonic and whole-tone scales.
┈┈┈┈▅┈┈┈┈┈▅ ┈┈
┈┈┈▕┈┈┈╱╲▕▀┈┈┈
┈┈┈╱╲┈┈▏▕╱╲┈┈┈
┈┈┈▏▕╱╲▏▎▏▕╱╲┈▃
┈╱╲▏▎▅▂▅▂▏▎▏▎▏▏
▂▏▎▏▕╭┳┳╮▏┊▏▕╱╲
▏▏┊▏▎┃┊┊┃▏▎▏▎▏▕
▇▆▅▃▂┻┻┻┻▂▃▅▆▇▉
