Oil major BP PLC BP., +6.04% BP, +5.98% tacked on 6%, Royal Dutch Shell PLC RDSB, +4.67% RDS.B, +3.60% rose 4.7% and BG Group PLC BG., +4.10% moved up 4.1%.
Utilize the input text as a context reference, choose the right relationship between 'BG Group' and 'Royal Dutch Shell' from the options.
Options: legal form, parent organization, creator, headquarters location