Casting from reference type to value or vice versa is called as
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Casting/Uncasting
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Boxing/Unboxing
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Packing/Unpacking
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Stack & Heap Conversion
B
Correct answer
Explanation
Boxing converts a value type to a reference type by storing it on the heap and creating a reference to it. Unboxing reverses this by extracting the value type from the reference. The other terms like packing/uncasting are not standard terminology in .NET or Java.