Figure shows a closed pipe (closed at both ends) of length 10 m. MN is a membrane (thin sheet) capable of doing simple harmonic motion of amplitude 1 mm along left and right from shown situation. On two sides of membrane are two gases  $G_1$  and  $G_2$  in which sound can travel at 300 m/s and 100 m/s respectively. Mark the INCORRECT statement(s). [For options C, D take maximum amplitude of standing wave patterns to be 1 mm]