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If `x in R^(+)` and `n in N`, we can uniquely write `x=mn+r` where `m in W` and `0lerltn`. We define x mod n=r for example 10.3 mod 3.1.3. The number of points of discontinuty of the function `f(x)=(x mod 2)^(2)+(x mod 4)` in the interval `0ltxlt9` is

A

0

B

2

C

4

D

None of these

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The correct Answer is:
C
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