This reply has been accepted as the best answer.
1>if one person fresh buy put option oi will increase
2>if some one fresh sell put then also oi will increase
now if co relation is high between nifty and put oi then we should analyse is it
i>long put(Bearish) or ii>short put(Bulish)
only observing co relation between nifty and option oi ,we cant conclude anything
.Hope you understand