Statement(I): In 15th group, down the group , the tendency to show '-3' ox. state decreases.Statement(II): In 15th group, down the group , metallic character increases.

Non metals due to higher EN show stable '-3' state in 15th group to attain OctectDown the group as metallic character increases tendency to gain electrons decreases∴ tendency to show '-3' ox.state decreases.