Understanding Bhabcopy (for F&O) received from NSE Website

There are two Bhabcopy available from NSE Daily Reports (for F&O) section.
One is Bhavcopy (zip). Inside the zip, files ‘fo181019.csv’ & ‘op181019.csv’ are present.
& another one is Bhavcopy file (csv). Inside the zip, file ‘fo18OCT2019bhav.csv’ is present.

  1. Full form of column header M of the file ‘fo18OCT2019bhav.csv’ written as OPEN_INT is simply Open Interest. Am I right?
  2. What is the full form of column header I of the file ‘op181019.csv’ written as OI_NO_CON?
  3. What is the full form of column header K of the file ‘op181019.csv’ written as TRD_NO_CON?

Yes right
Open Interest (in No. of contracts)
Traded volume (in No. of contracts)

There is one more file for FNO Bhavcopy, check it also.

FNO Bhavcopy

Thank you @Newbie420 for your reply.