Scandium ${ } _ { 21 } ^ { 43 }$

Multiple Choice

Scandium ${ } _ { 21 } ^ { 43 }$ Sc decays by emitting a positron. What isotope is the product of this decay?

A) ${ } _ { 21 } ^ { 43 } \mathrm { Ca }$
B) ${ } _ { 21 } ^ { 45 } \mathrm { Sc }$
C) ${ } _ { 21 } ^ { 43 } \mathrm { Sc }$
D) ${ } _ { 20 } ^ { 44 } \mathrm { Ca }$
E) ${ } _ { 22 } ^ { 44 } \mathrm { Ti }$