Which of the following groups is a strong electron-donating group?

Which of the following groups is a strong electron-donating group?

Step 1: Understand what an electron-donating group is. It is a part of a molecule that can donate electrons to another part of the molecule.
Step 2: Identify the –OH group, which is known as a hydroxyl group.
Step 3: Learn about the resonance effect. The –OH group can share its electrons with the rest of the molecule through resonance.
Step 4: Recognize that the ability to share electrons makes the –OH group a strong electron-donating group.
Step 5: Conclude that the –OH group has a +M effect, meaning it donates electrons effectively.

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