Final answer:
Buddha, or Siddhartha Gautama, is not an avatar of the god Vishnu, that is a false statement. He was the founder of Buddhism, which is distinct from Hinduism though it shares some concepts.
Step-by-step explanation:
The statement that Buddha is one of the avatars (incarnations) of the god Vishnu is false. Siddhartha Gautama, more commonly known as Buddha, was a prince who later became an ascetic and founded Buddhism, a religion separate from Hinduism. Hinduism and Buddhism share some concepts such as Dharma, reincarnation, and karma, but Buddhism focuses on the Four Noble Truths and the Eightfold Path to achieve enlightenment. Instead, it was Krishna who is traditionally regarded as one of the avatars of Vishnu within Hinduism.