option strategy for expiry day:

buy 6100ce jan series and 6100pe dec series when nf trades at near 6100 levels,if nifty moves up near 6120-30 range then book ce and hold pe,
if nifty moves down then book pe and ce near 6040 range,appreciation in 6100 pe will be much more than depreciation in 6100ce

if can hold patience try this strategy in later part of the day