Two different sub-atomic particles are described below:

particle x: carries a negative charge
particle y: attracts particle x

which statement is true?
x is a neutron and y is an electron.
x is a neutron and y is a proton.
x is a proton and y is an electron.
x is an electron and y is a proton.

X is an electron and Y is a proton.

Explanation:

The particle X caries negative charge it means it have one extra electron.

When number of electrons becomes greater than protons particle have negative charge and

Particle Y  attract particle X it means Y has positive charge because opposite charges attract each other and it must be a proton because proton has positive charge while neutron is neutral.

Symbol  and charge of proton= P+  

Symbol  and charge of neutron= n0  

Mass of proton=1.672623×10-27 Kg

Mass of neutron=1.674929×10-27 Kg

Symbol and charge on electron = e-

Mass= 9.10938356×10-31 Kg