menuconfig A
    bool "A"
menuconfig A
    bool "A"
menu "menu 2"
config M
    def_bool !(n || (n || A = n))
    default !A if y
    default y if !A
config S
    bool
    select A if NOT_DEFINED = y
    select E if A
    imply A
    imply E if A
endmenu
choice
    bool "C"
config N
    bool "N"
config O
    bool "O"
endchoice
choice B
    bool "B"

config B1
    tristate "B1"

config B2
    tristate "B2"

endchoice

if !(NOT_DEFINED != A)
comment "comment 2"
endif

menu "visible if menu"
    visible if A
    visible if NOT_DEFINED
endmenu