Arrange in the ascending order of their metallic character.
None of the above
The trend in the metallic character is opposite to that of ionization energy. Metallic character increases down a group and decreases along a period as we move from left to right.
Left to right metallic character decreases
Top to bottom metallic character increases
(less metallic due to smaller size)
(more metallic due to large size)
Hence option 2 is correct.