Answer:
it would be your first answer,
Step-by-step explanation:
if a line is drawn horizontally through the middle, you get two equations
1 + 1 -> 2 + ? is the top equation
1 + 1 -> 1 + ? is the bottom equation
for top equation, ? is just 0
for the bottom equation, ? is just 1
so, the particle will have an atomic mass of 0 and a charge of 1, which would correspond to
(ignore the division line separating the 0 and the 1 it is just the easiest way to display what i mean without drawing it )