A Bugle Can Be Represented by a Cylindrical Pipe of Length

A bugle can be represented by a cylindrical pipe of length L = 1.24 m.Since the ends are open,the boundary conditions force the standing wave (representing the displacement of the air molecules) that is produced in the bugle to have antinodes at the open ends of the bugle,where the air molecules move back and forth the most.The longest wavelength standing wave inside the bugle is

A) 0.620 m.
B) 1.24 m.
C) 2.48 m.
D) 3.78 m.
E) 4.96 m.