Let \( f : \mathbb{R} \to \mathbb{R} \) be defined asWhere \( a, b, c \in \mathbb{R} \) and \( [t] \) denotes greatest integer less than or equal to \( t \). Then, which of the following statements is true?
There exists \( a, b, c \in \mathbb{R} \) such that \( f \) is continuous on \( \mathbb{R} \).
If \( f \) is discontinuous at exactly one point, then \( a + b + c = 1 \)
If \( f \) is discontinuous at exactly one point, then \( a + b + c \ne 1 \)
\( f \) is discontinuous atleast two points, for any values of \( a, b \) and \( c \)