I do agree it is Pelopidas mathias.
It does get tricky in some cases.
Here are examples of Indian P. agna & mathias.
P. mathias male.
https://commons.wikimedia.org/wiki/F...asambe_(2).jpg
Female .Taken in Africa. P. mathias occur throughout sub-Saharan Africa.
https://en.wikipedia.org/wiki/File:Pelopidas_sp.jpg
P. mathias female India.
https://www.ifoundbutterflies.org/me...88e37405-1.jpg
P. agna males.
https://en.wikipedia.org/wiki/Pelopi...18_09_2012.jpg
https://www.ifoundbutterflies.org/me...gale_ak890.jpg
P. agna female.
https://commons.wikimedia.org/wiki/F...a_20140621.jpg
TL Seow: Cheers.