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In molecules, C, H, O, and N atoms usually make __, __, __, and __ bonds respectively.

In molecules, C, H, O, and N atoms usually make __, __, __, and __ bonds respectively.

3, 2, 4, 2

2, 1, 3, 4

3, 2, 1, 4

4, 1, 3, 2

4, 1, 2, 3


The answer is :

4, 1, 2, 3.


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