Select the most appropriate option to substitute the bracketed segment in the given sentence. If there is no need to substitute it, select 'no substitution required'.
The query isn't (whether he will admit it, but when).
1
No substitution required
2
whether he will be admitting it or not, but when?
3
whether or nor he will admit it, but when?
4
whether he will admit it or not, but when?