The correct option is D 1H1
The nuclear reaction 7N14+2He4→8O17+1H1.
If true enter 1, else enter 0. is correct.
The sum of atomic numbers on LHS =7+2=9
The sum of atomic numbers on RHS =8+1=9
The sum of mass numbers on LHS 14+4=18
The sum of mass numbers on RHS 17+1=18