1 choice
2 	prompt "This is always invisible"
3 	depends on n
4 
5 config DUMMY
6 	bool "DUMMY"
7 
8 endchoice
9 
10 choice
11 	prompt "Choose A or B"
12 
13 config A
14 	bool "A"
15 
16 config B
17 	bool "B"
18 
19 endchoice
20 
21 config FOO
22 	bool "FOO"
23 	depends on A
24 
25 choice
26 	prompt "Choose X"
27 	depends on FOO
28 
29 config X
30 	bool "X"
31 
32 endchoice
33