Question

Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
A. There are many gadgets that are operated by a remote control and contain a silicon chip.
B. This produces an infra-red beam, made up of electromagnetic waves.
C. When a button is pressed on the remote control, the chip sets off an electromagnetic vibration.
D. The beam carries a coded signal for operating the systems.

A ADCB
B ACDB
C ACBD
D BACD
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