I think Indira is in SN and Zara is at lahor. because
1) as Indu will think lahor wali is indira and her mother which is actually not.then only real Indira can fight for her daughter.and story proceed.
2)rishi feels zara is Indira . to prove protagonist is correct cvs has to make sn wali as Indira
3)cvs has shown similarity in thinking and behavior between Indu and SN wali.and only coincedence between Indu and Lahorwali
4) then only cvs can show some drama in dna and finger print report
5) flower of god has fallen on paper saying Zara (snwali )is Indira
6) rt from leap SN wali was shown as Indira .
7) lahorwali is burnt at the time of funeral of Zara which might be kept in place of Indira by malik( evidence; malik said he has given personality to Zara