tenuki, is White's privilege.
After that, taking the ko and white connect is Black's privilege.
take a stone, 1 point
Black territory decrease by 5 points
Black takes 1 stone from the ko -1 points.
There's a 1/3 point ko remaining.
The total is 5 and 1/3 points.
White should play this when the ambient temperature is about 6.
In theory this is not White's privilege.
In practice, White could plays slightly before it would get reverse sented.
Since 6 points and 5 1/3 points are really close, this whole situation would get resolved pretty quickly if not right the way.
White's lost here would be pretty small.
Of course, the actual best play depends on the actual board position.