Which among the following group $16$ elements exists in more than two allotropic states?

Polonium

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Tellurium

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Selenium

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Oxygen

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Solution

The correct option is B Selenium
Sr. No. Element Allotropes
(a) Polonium $α$ and $β$ -polonium
(b) Tellurium None
(c) Selenium Trigonal, rhombohedral, three deep red monoclinic forms $(α, β, a n d λ - amorphous red, black vitrous selenium)$
(d) Oxygen Dioxyen and ozone

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Sr. No.	Element	Allotropes
(a)	Polonium	$α$ and $β$ -polonium
(b)	Tellurium	None
(c)	Selenium	Trigonal, rhombohedral, three deep red monoclinic forms $(α, β, a n d λ - amorphous red, black vitrous selenium)$
(d)	Oxygen	Dioxyen and ozone