Consider an electron in the nth orbit of a hydrogen atom in the Bohr model. The circumference of the orbit can be expressed in terms of the de Broglie wavelength \[\lambda \]of that electron as [CBSE PMT 1990]

• A.            \[(0.259)\ n\lambda \]     
• B.            \[\sqrt{n}\lambda \]
• C.            \[(13.6)\ \lambda \]          
• D.            \[n\lambda \]