lowest option brokerage

[dksingh47]

I was trying to figure out who charges the lowest per lot. I believe it is R K Global with Rs 9 per lot. But there must be people who are charging reducing cost as the turnover increases. For eg if we trade for 2000 nifty option of size 50 in a month the turnover will be 50*100*2000(lot size*avg premium of an ATM call/put*2000 total buy and sell lots per expiry. In this case the turnover goes to 1Crore and the brokerage fees could be even lower. Any views please.