Which one among the following animals gives birth to the biggest baby?

The blue whale gives birth to the largest baby in the animal kingdom. A newborn blue whale calf typically weighs between 2.5 to 3 tons (approximately 2,700 kg) and measures about 7 meters in length. In comparison, the other animals listed give birth to significantly smaller offspring. An African elephant calf weighs approximately 200 to 300 pounds (90 to 120 kg). A rhinoceros calf weighs about 88 to 143 pounds (40 to 65 kg) depending on the species. A hippopotamus calf is the smallest among the options, weighing between 50 to 120 pounds (25 to 55 kg) at birth. The blue whale's massive birth size is a result of its status as the largest known animal to have ever lived, requiring a large neonate to survive in marine environments.