Is answer 12 (without considering stereoisomers)?
Yep ans is 12..Plz share your approach
See two from Cn5 and No2, Ono. And then for each NC there are two possibilities as No2 and Ono. So there are 5 NC so total ways = 5 x 2 = 10. And plus 2 of cn5 no2 and cn5 Ono. So total 12