,

,

and

. ONE OR MORE THAN ONE of these four option(s) is(are) correct answer(s). • For each question, choose the option(s) corresponding to (all) the correct answer(s). • Answer to each question will be evaluated according to the following marking scheme: Full Marks ONLY if (all) the correct option(s) is(are) chosen; Partial Marks : If all the four options are correct but ONLY three options are chosen; Partial Marks : +2 If three or more options are correct but ONLY two options are chosen, both of which are correct; Partial Marks : If two or more options are correct but ONLY one option is chosen and it is a correct option; Zero Marks : 0 If none of the options is chosen (i.e. the question is unanswered); Negative Marks : -2 In all other cases A particle of mass is moving in a circular orbit under the influence of the central force , corresponding to the potential energy , where is a positive force constant and is the radial distance from the origin. According to the Bohr's quantization rule, the angular momentum of the particle is given by , where is the Planck's constant, and a positive integer. If and are the speed and total energy of the particle, respectively, then which of the following expression(s) is(are) correct?