Zeal Workbook: Mathematical Logic - First Order Logic

Question

Answer for this is a) but m getting d) as right option please check it 

Comments

Prince Sindhiya A means "Any heavyweight can defeat any lightweight"

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How to write this can you explain anyone of these two ?or please tell me from where I can learn this, here domain is not given so I am finding diffculty in these

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hi can anyone clear my doubt ?