No. Soy milk doesn't have some of the nutrients and fat that milk does. Soy milk is lower in fat than milk, plus it doesn't has as much Vit. B12 and calcium as what a baby needs. Homogenized milk is...
With this trick question, most people will say "Milk," (which is not true) just for the fun of the questioner catching the questionee off guard. Cows drink water, not milk.