What is the full form of STD?

Subscribed Trunk Dialling

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Subscriber Trunk Dialling

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Subscription Trunk Dialling

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Subsidised Trunk Dialling

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Solution

The correct option is B Subscriber Trunk Dialling
The telecommunication sector in India has evolved at a rapid pace in recent times. Before the mobile revolution, India had one of the largest telecom networks in Asia - more than two-thirds of the villages had already been covered under Subscriber Trunk Dialling (STD) telephone facility.

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