Which of the following groups is a weak -I effect?

Which of the following groups is a weak -I effect?

Step 1: Understand what -I effect means. The -I effect refers to the electron-withdrawing effect of certain groups in a molecule.
Step 2: Identify what a weak -I effect is. A weak -I effect means that the group does not strongly pull electrons away from the rest of the molecule.
Step 3: Look at the -CH3 group (methyl group). It is made of carbon and hydrogen atoms.
Step 4: Recognize that the -CH3 group is not very good at pulling electrons away. Instead, it can donate some electrons.
Step 5: Conclude that since -CH3 has a weak ability to withdraw electrons, it is classified as a weak -I effect.

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