Buy Amazon Pay GV with SBI Cashback for 5% CB. Book tickets via Adani One app. You will get coins equivalent to 5% of Transaction amount. You can use the coins for your next booking and get value of 1 coin = 1 Rs, or buy GV's from their catalogue and get value of 1 coin = 0.50 Rs. Coins will be credited after 72 hours from end of journey.
Kotak card gives convience fees wavier on train ticket.
Sbi irctc & hdfc irctc are best if u booking for yourself..
If booking for other then u have to look if sbi cb or hdfc millennia gives cb on train spends