Which combination is best explained by the co-ordinate covalent bond [JIPMER 2001; CBSE PMT 1990]

Which combination is best explained by the co-ordinate covalent bond [

1.	Which combination is best explained by the co-ordinate covalent bond [JIPMER 2001; CBSE PMT 1990]
A.	\[{{H}^{+}}+{{H}_{2}}O\]
B.	Cl + Cl
C.	\[Mg+\frac{1}{2}{{O}_{2}}\]
D.	\[{{H}_{2}}+{{I}_{2}}\]
Answer» B. Cl + Cl

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Which combination is best explained by the co-ordinate covalent bond [JIPMER 2001; CBSE PMT 1990]

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