In which year did John Alexander Newlands propound a new concept of the 'Law of Octaves' proposing the periodicity of chemical elements arranged in order of atomic weight?

Correct option is B

John Alexander Newlands proposed the 'Law of Octaves' in 1865. He observed that when elements were arranged in order of increasing atomic weight, the properties of every eighth element showed similarities to the first, like the eighth note in an octave of music.