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निम्नलिखित में आयनों का कौन -सा समूह समइलेक्ट्रॉनिक स्पीशीजों को दर्शाता है ?
A. `K^(+), Cl^(-),Ca^(2+), Sc^(3+)`
B. `Ba^(2+),Sr^(2+),K^(+),S^(2-)`
C. `N^(3-),O^(2-),F^(-),S^(2-)`
D. `Li^(+),Na^(+),Mg^(2+),Ca^(2+)`

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Correct Answer - A
विकल्प (a) में दी गयी सभी स्पीशीजो में 18 इलेक्ट्रॉन उपस्थित है , अतः ये समइलेक्ट्रॉनिक है ।

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