The unit '$rad$' is the correct measure for which of the following?
- AThe probability of a photon in a gamma-ray beam producing ions in a target.
- BThe energy delivered to a target.
- CThe biological effect of radiation.
- DThe rate of decay of a radioactive source.
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In the given reaction $_Z{X^A} \to _{Z+1}{Y^A} \to _{Z-1}{K^{A-4}} \to _{Z-1}{K^{A-4}}$,radioactive radiations are emitted in the sequence:
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