Range of the function f defined by $\mathrm{f}\left(\mathrm{x}\right)=\left[\frac{1}{\sin \left\{\mathrm{x}\right\}}\right]$ (where [.] and {.} respectively denote the greatest integer and the fractional part functions) is

• A

  Z, the set of integers

• B

  N, the set of natural numbers

• C

  W, the set of whole numbers

• D

  {2, 3, 4, ...}