Answer:
(d) Metallic nature decreases in a
period from left to right. Thus,
\[\underset{\xrightarrow[\text{in
}\,\text{decreasing}\,\,\text{order}]{\text{Metallic}\,\text{nature}}}{\mathop{\text{K
Mg Al}}}\,\]
In a group, metallic nature increases from top to bottom.
Thus, \[Al\text{ }>\text{ }B\]
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