An element \( R \) is in group 13 . Which is true with respect of \( R ? \) (A) It is a gas at r...

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An element \( R \) is in group 13 . Which is true with respect of \( R ? \)
(A) It is a gas at room temperature
(B) It has an oxidation state of \( +4 \)
(C) It forms an oxide of the type \( \mathrm{R}_{2} \mathrm{O}_{3} \)
(D) It forms a halide of the type \( R X_{2} \)
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