Which of the Following Isotopes Would Be the Most Appropriate $\alpha$

Multiple Choice

Which of the following isotopes would be the most appropriate for the end-labeling of a DNA strand with a radioactive phosphate?

A) $\alpha$ -³²P
B) ³⁵S
C) $\beta$ -³²P
D) $\gamma$ -³²P
E) ¹⁴C