Liquid Funds/Overnight Funds

I want to purchase any liquid fund/Overnight funds, I usually do Intraday fno trading (only selling).
I will keep 10-15% of my whole capital in cash for daily profit/loss.
Can anybody suggest me safest funds among the long list which is eligible for cash component from zerodha.

Overnight funds would be safer than liquid as they invest for 1 day only every day + have collateral against default. So just pick up few of those from Zerodha list - say HDFC/ICICI/SBIN etc.