Which one of the following has the lowest m.p ?....

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Which one of the following has the lowest m.p ?
\( \mathrm{P} \)
(1) \( \mathrm{B} \)
(2) \( \mathrm{Al} \)
W
(3) \( \mathrm{Ga} \)
(4) \( \mathrm{Tl} \)


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