You can go both ways, but the second one is definitely complicated and might raise doubts also. In my opinion Easier way is to get a Gift deed from your Parents. There is no gift deed form as such, just ask a notary in your country, he will provide with you a Gift deed as per your country's format on a notarised paper. It should be ideally signed by your parents (donor) and you (donee) and few witnesses. There are number of formats available on this forum also if you want to check out.
But the main content of the deed should be that your parents gifted you the money out of their free will, love and affection and without any coercion or undue influence etc., on so and so date via so and so check number from their account number-abc, in Bank-xyz. That you are free to use the money as per your wish and needs. Also that you accept this gift etc. Something along these lines will be fine.