Scales in sixths

[sym39]

After three years of majors, minors and arpeggios, teacher has started me on 3rds, 6ths and 10ths.  Starting with C major. I have remembered the 3rd and 10th but for the life of me cannot remember how the 6th starts.  Is it:

A:  LH on C, RH on A or,
B:  LH on A, RH on C ?

Thanks,
sym39

[pianowolfi]

RH on C, LH on E
Your Version A are also sixths though
Your Version B are thirds unless you play it with hands crossed 

[sym39]

Thank you pianowolfi,
syn39