q3.asm

  mov bx, 40 ; Assign a value to bx

  cmp bx, 4
  jl then_block
  cmp bx, 40
  jl else_if_block
  mov al, 'C'
  jmp done_block

then_block:
  mov al, 'A'
  jmp done_block

else_if_block:
  mov al, 'B'

done_block:
  mov ah, 0x0e
  int 0x10

  jmp $

; Padding and magic number

  times 510-($-$$) db 0
  dw 0xaa55