Which of the following exists in polymeric form? (a) \( \mathrm{AlCl}_{3} \) (b) \( \mathrm{BeCl...

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Which of the following exists in polymeric form?
(a) \( \mathrm{AlCl}_{3} \)
(b) \( \mathrm{BeCl}_{2} \)
(c) \( \mathrm{SiC} \)
(d) \( \mathrm{B}_{2} \mathrm{H}_{6} \)
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