Match the List - I (Phenomenon associated with electromagnetic radiation) with List - II (Part of electromagnetic spectrum) and select the correct code from the choices given the lists :
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List - I
List - II
(I)
Doublet of sodium
(A)
Visible radiation
(II)
Wavelength
corresponding to
temperature associated
with the isotropic
radiation filling all space
(B)
Microwave
(III
Wavelength emitted by
atomic hydrogen in
interstellar space
(C)
Short radiowave
(IV)
Wavelength of radiation
arising from two close
energy levels in hydrogen
(D)
X - rays