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Option 4 : Prototype

The correct word here is ''prototype'' which means ''The first model of a new device.'' Thus option 4 is the correct answer.

Hype: extravagant or intensive publicity or promotion.

Beta: denoting the second of a series of items, categories, forms of a chemical compound, etc.

Model: a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original.

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