LTCG on property sale for NRI

1. Can a non-resident taxpayer (Indian citizen, holding Indian passport) choose between 20%  with indexation vs 12.5% without indexation on the LTCG  from the Sale of his property purchased in 2007?
2. Does the provision to carryover capital loss from Sale of property for the next 8 years and adjusting it with capital gain arising from another property within that period still applicable ?