Which of the following structures have a 1+ formal charge on the sulfur atom?

Question

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In structure III, sulfur has a formal charge of +1 because it has 5 valence electrons (group 6) and is bonded to only 3 other atoms (carbon and two hydrogens), which gives it a total of 6 electrons. This means it is one electron short of the octet rule and has a positive formal charge. The other structures do not have a sulfur atom with a +1 formal charge.

Which of the Following Structures Have a 1+ Formal Charge