Name the region of the atom where protons and neutrons are located. This
region is indicated by
label B.

Name the region of the atom where electrons are
located. This
region is indicated by label A.

Ithink that the answer is b

B.1 - hydrogren-1 can only mean there is 1 neutron. it's obvious there is 1 proton or else it wouldn't be hydrogen, so they wouldn't put a number after it unless they were indicating the number of neutrons