How will you correlate Bohr’s concept of hydrogen atom with de-Broglie concept?
Or
Show that the circumference of Bohr orbit for the hydrogen atom is an integral multiple of de-Broglie wavelength associated with electron revolving around the orbit.

According to de-Broglie equation,

From equations (1) and (2), we have

From eq. (3), it is evident that circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de-Broglie wavelength.