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# The electro negativity of the following elements increase in the order :

$(a)\;C,N,Si,P \\(b)\; N,Si,C,P \\ (c)\;Si,P,C,N \\ (d)\;P,Si,N,C$

Electro negative along a period and decreases down the group.
$Si,P,C,N$ is correct order.
Hence c is the correct answer.