Evaluate the significance of positron emission in understanding nuclear stability and transformations.

• A. Positron emission is primarily used for medical imaging and has no relevance to nuclear transformations.
• B. Positron emission is significant as it provides insights into nuclear instability and the transformation of elements, aiding in the study of nuclear chemistry.
• C. Positron emission only affects the physical properties of elements, not their nuclear stability.
• D. Positron emission is insignificant and does not contribute to the understanding of nuclear stability.

Answer: (B)