49. a rectangular hollow metal waveguide is required to be so designed to propagate a 9375 mhz signal in its te mode that the guide wavelength equals the cut-of

49. A rectangular hollow metal waveguide is required to be so designed to propagate a 9375 MHz signal in its TE mode that the guide wavelength equals the cut-off wavelength. The value of 'a is breadth or the wider dimension 0r the waveguide. [Take. b=- A. 0.112 m C. 0.05 m B. 0.09 m D 0.016 m an putput