16) in 3- dimensional space, a particle of mass m moves in a potential b sin 2ar where ris the distance of the particle from the origin. b and a are real consta

16) In 3- dimensional space, a particle of mass m moves in a potential B sin 2ar where ris the distance of the particle from the origin. B and a are real constants. Which of the following statement is correct? [Question ID = 5138] The motion is periodic in r with an oscillation length scale 27 d. [Option 1D 20550] The trajectory of the particle is always contined to a plane passing through the origin. (Option ID 20552] The motion is periodic in r with an oscillation length scale t/a. [Option ID 20549