To answer this question, the user needs to know about the history of tomato and its earlier name.
Option A: Love Apple - This option is correct. The tomato was originally called "pomme d'amour" or "love apple" in French because it was believed to have aphrodisiac qualities. It was also thought to be poisonous and was mainly grown as an ornamental plant.
Option B: Red Ball - This option is incorrect. Although the tomato is round like a ball and is red in color when ripe, it was not called a "red ball" in the past.
Option C: Red Apple - This option is incorrect. The tomato was not called a "red apple" in the past, although it may resemble an apple in its shape and color.
Option D: Love Ball - This option is incorrect. The tomato was not called a "love ball" in the past.
Therefore, the answer is: A. Love Apple.