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in Physics by (89.4k points)
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Which of the following have `X-O-X` linkage ?
( Where X is central atom )
`(I)Cr_(2)O_(7)^(2-)" "(II)S_(2)O_(3)^(2-)" "(III)"pyrosilicate "(IV)"Hyponitrus acid"`
A. `(i)(iii)`
B. `(iii)(iv)`
C. `(i)(iii)(iv)`
D. `(i)(ii)`

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