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The correct order of atomic radii in group $13$ elements is

• A
  $\mathrm{B} < \mathrm{Al} < \mathrm{In} < \mathrm{Ga} < \mathrm{Tl}$
• B
  $\mathrm{B} < \mathrm{Al} < \mathrm{Ga} < \mathrm{In} < \mathrm{T}$
• C
  $\mathrm{B} < \mathrm{Ga} < \mathrm{Al} < \mathrm{T}) < \mathrm{In}$
• ✓
  $\mathrm{B} < \mathrm{Ga} < \mathrm{Al} < \mathrm{In}  < \mathrm{Tl}$