Which of the Following Isotopes Is Used in the Medical ${}^{ 67 }_{ 31 }Ga$

Which of the following isotopes is used in the medical diagnosis of thyroid disorders?

A) ${}^{ 67 }_{ 31 }Ga$
B) ${ } _ { 81 } ^ { 201 } \mathrm { Tl }$
C) ${ } _ { 5 } ^ { 10 } \mathrm {~B}$
D) ${ } _ { 9 } ^ { 18 } \mathrm {~F}$
E) ${ } _ { 53 } ^ { 131 } \mathrm { I }$