A particle slides back and forth between two inclined friction less planes as shown in Fig.Which of the following statements are correct with respect to the motion of particle?
(i) The motion is oscillatory
(ii) The motion is simple harmonic
(iii) It his the initial height, period $=\frac{4}{\sin \mathrm{\theta }}\sqrt{\frac{2\mathrm{h}}{\mathrm{g}}}$
(iv) If h is the initial height, period $=\sqrt{\frac{2\mathrm{h}}{\mathrm{g}}}\sin \mathrm{\theta }$

 

• A

  (i, iii)

• B

  (i, iv)

• C

  (i, ii)

• D

  (iii, iv)