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(X) and (Y) are elements belonging to 13th group. The periodic property of (X) is less than (Y). Identify correct combination among the following

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a
Ga and In -----Melting point
b
B and Al ------Density  at 298 K
c
Tl and In ------Boiling point
d
Al and Tl -------EM+3|M°

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detailed solution

Correct option is A

Melting point ---- Ga < In < Tl

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