Correct option is D
The correct one-word for the given group of words is
Portable.
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Portable: Something that is easily carried or moved. (आसानी से ले जाने योग्य)
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Example: This portable charger is very useful for travelers.
Meanings of the other options:
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Export: Sending goods to another country (निर्यात)
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Import: Bringing goods into a country (आयात)
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Potable: Safe to drink (पीने योग्य)