The Data Below from the Molecular Ion Region of the Mass

Multiple Choice

The data below from the molecular ion region of the mass spectrum of a halogen-containing compound are consistent with the presence of what halogen(s) in the original compound? intensity
M ⁺ _$\bullet$
51) 0
M ⁺ _$\bullet$ +2
100) 0
M ⁺ _$\bullet$ +4
49) 0

A) One Br
B) One Cl
C) One Br and one Cl
D) Two Br
E) Two Cl