Question: What is the output of the following code: string str = ABC; MessageBox.Show(str.IndexOf(a).ToString(); Select one: O a. O b.-1 O c. 1 d. Error Clear

What is the output of the following code: string str =

What is the output of the following code: string str = "ABC"; MessageBox.Show(str.IndexOf("a").ToString(); Select one: O a. O b.-1 O c. 1 d. Error Clear my choice

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