Assertion $(A)$: Optical fibres are widely used in communication networks. Reason $(R)$: Optical fibres are small in size,light in weight,flexible,and there is no scope for interference in them.
- ABoth $(A)$ and $(R)$ are true and $(R)$ is the correct explanation of $(A)$
- BBoth $(A)$ and $(R)$ are true but $(R)$ is not the correct explanation of $(A)$
- C$(A)$ is true but $(R)$ is false
- D$(A)$ is false but $(R)$ is true
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