The Q Value for the Following Reaction ${ } _ { 4 } ^ { 9 } \mathrm { Be } ( \alpha , \mathrm { n } ) { } _ { 6 } ^ { 12 } \mathrm { C }$

The Q value for the following reaction, ${ } _ { 4 } ^ { 9 } \mathrm { Be } ( \alpha , \mathrm { n } ) { } _ { 6 } ^ { 12 } \mathrm { C }$ ,is (in MeV) m(alpha) = 4.002 603 u
M(Be) = 9.012 182 u
M(n) = 1.008 665 u
M(C) = 12.000 00 u
1 u = 1.66 *10 ^{- 27} kg

A) 8.4
B) 6.2
C) 7.3
D) 5.7
E) 3.5