When there is rainfall, we all love seeing the rainbows in the sky. It manifolds the beauty of the nature. And when looked closely we can distinguish all the seven colours of the rainbow. Can you tell what phenomenon of light leads to the formation of rainbows?

• A. Reflection of light
• B. Refraction of light
• C. Rainbows do not exist, it is mere illusion of our eyes
• D. Rarefaction