The zero-point energy of the vibration of °Cl, mimicking a harmonic oscillator with a force constant k = 2293.8 Nm is (a) 10.5x 10-21 J The selection rules for the appearance, ofP branch in the rotational-vibrational ahsarntin (b) 14.8 x 1021 J (c) 20x 10-21 J (d) 29.6 x 10-21 J