Expiry doubts on options


I am talking of banknifty options, weekly expiry. For example, this week’s banknifty option has an expiry on February 21. Let’s say on the day of expiry - that is, 21st February- is it possible to buy the option that expires on February 28? In other words, can we buy next week’s option before this week’s option expires?

Thanks in advance.

Yes you can