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(B) Statement $a$ is correct: Benzene $(C_6H_6)$ has $6$ $C-C$ sigma bonds and $6$ $C-H$ sigma bonds,totaling $12$ sigma bonds.Statement $b$ is incorr

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$a, b$

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(B) Statement $a$ is correct: Benzene $(C_6H_6)$ has $6$ $C-C$ sigma bonds and $6$ $C-H$ sigma bonds,totaling $12$ sigma bonds.Statement $b$ is incorrect: According to Fajan's rule,smaller cations have higher polarizing power. Since $Li^+$ is smaller than $K^+$,$LiF$ has more covalent character than $KF$. Wait,the statement says $LiF$ is more covalent than $KF$,which is correct.Statement $c$ is incorrect: According to Fajan's rule,higher oxidation state of the cation leads to higher covalent character. Therefore,$SnCl_4$ $(Sn^{4+})$ is more covalent than $SnCl_2$ $(Sn^{2+})$.Thus,statements $a$ and $b$ are correct.

The correct statements from the following are:
$a$) The total number of sigma bonds present in benzene is $12$
$b$) $LiF$ is more covalent than $KF$
$c$) $SnCl_2$ is more covalent than $SnCl_4$

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The correct statements from the following are:$a$) The total number of sigma bonds present in benzene is $12$$b$) $LiF$ is more covalent than $KF$$c$) $SnCl_2$ is more covalent than $SnCl_4$