If $f(x) = [x] - [\frac{x}{4}]$,$x \in R$,where $[x]$ denotes the greatest integer function,then:
- A$\lim_{x \rightarrow 4^{-}} f(x)$ exists,but $\lim_{x \rightarrow 4^{+}} f(x)$ does not exist.
- B$f(x)$ is continuous at $x = 4$.
- C$\lim_{x \rightarrow 4^{+}} f(x)$ exists,but $\lim_{x \rightarrow 4^{-}} f(x)$ does not exist.
- DBoth $\lim_{x \rightarrow 4^{-}} f(x)$ and $\lim_{x \rightarrow 4^{+}} f(x)$ exist,but are not equal.
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