choice
	prompt "choice"

config A
	bool "A"

config B
	bool "B"

if B
choice
	prompt "sub choice"

config C
	bool "C"

config D
	bool "D"

if D
choice
	prompt "subsub choice"

config E
	bool "E"

endchoice
endif # D

endchoice
endif # B

endchoice