Answer: Option (D) is the correct answer.
Step-by-step explanation:
Metallic character is defined as the ability of an atom to lose electrons in order to gain stability.
Generally metals show metallic character and no non-metals tends to show metallic character.
When we move from left to right in a periodic table then metallic character decreases due to increase in number of non-metals.
Electronegativity is defined as the ability of an atom to readily accept one or more number of electrons.
It is known that when we move from left to right in a periodic table then there occurs a decrease in size of the elements.
Hence, electronegativity increases on moving from left to right along a period.
Nuclear shielding also decreases from left to right in a periodic table.
Thus, we can conclude that metallic character decreases as we move from left to right across the periodic table.