You're misunderstanding. I'm not saying Betelgeuse would be a type Ia. Betelgeuse will be a Type II supernova. I'm wondering whether Type II supernovae with

You're misunderstanding. I'm not saying Betelgeuse would be a type Ia. Betelgeuse will be a Type II supernova. I'm wondering whether Type II supernovae with smaller partners later become Type Ia once the larger partner explodes and becomes a white dwarf. The former smaller partner then becomes the relatively larger partner that loses mass to the remnant.