Final answer:
The correct electrical charges of subatomic particles are I - negative charge, II - positive charge, III - no charge, matching option a) as electrons are negative, protons are positive, and neutrons are neutral.
Step-by-step explanation:
The question involves identifying the electrical charges of subatomic particles. According to basic atomic theory and the convention used in chemistry and physics, protons have a positive charge, electrons have a negative charge, and neutrons have no charge. Taking this into account, the correct representation of the electrical charges of the subatomic particles would be: I - negative charge, II - positive charge, III - no charge, which corresponds to option a).