The correct answer is option 1, Edwin Hubble. Edwin Hubble was an American astronomer who provided the first evidence of the Big Bang theory. In the 1920s, Hubble made observations of galaxies outside of our own Milky Way galaxy and noticed that they were moving away from each other. He also observed that the farther a galaxy was from us, the faster it was moving away. This discovery supported the idea that the universe was expanding.

Hubble`s observations led to the development of Hubble`s law, which states that the velocity at which galaxies are moving away from us is directly proportional to their distance from us. This concept provided the evidence needed to support the Big Bang theory, which suggests that the universe originated from a single point and has been expanding ever since.

While Albert Einstein, S. Chandrasekhar, and Stephen Hawking are all renowned scientists who made significant contributions to their respective fields, they were not directly involved in providing evidence for the Big Bang theory.