The correct order of metallic characters for the given elements is B,Na,Al,K:
A
Na>Al>K>B
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B
Al>K>Na>B
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C
Na>K>Al>B
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D
K>Na>Al>B
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Solution
The correct option is DK>Na>Al>B Metallic character decreases as we move from left to right across a period and increases down a group.
Down the group it follows the order: K>Na and Al>B
Across the period, the order is: Na>Al
Hence, the overall order will be: K>Na>Al>B