I think it's the 3rd one. Might be wrong though.
Answer:
A 2013 preliminary study at UCLA on the effect of antioxidants found in pomegranates on memory.
Explanation:
The rest of the sources are either not credible in terms of research such as the magazine article and the trainer. The advertisement has bias when providing information making the study the best choice.
One hundred seven thirteen and forty nine hundreds
4 lines, 2 couplets, 1 stanza, and 1 quatrain