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Rearrange the following five sentences (1), (2), (3), (4) and (5) in the proper sequence to form a meaningful paragraph; then answer the questions...

Rearrange the following five sentences (1), (2), (3), (4) and (5) in the proper sequence to form a meaningful paragraph; then answer the questions given below them.

(1) For instance, if we measure the room temperature continuously and plot its graph with time on X-axis and temperature on the Y-axis,we get a continuous waveform, which is an analog signal. Analog is always continuous.

(2) The absence or presence of something can be used to plot a digital signal.

(3) An analog signal is a continuously varying signal, similar to a sinusoidal waveform.

(4) Any signal can be classified into one of the two types : analog and digital.

(5) In contrast, a digital signal takes the form of pulses,where we have something or nothing.

1) Which of the following should be the FIRST sentence after rearrangement?

A. 1


B. 2


C. 3


D. 4


E. 5


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