The correct match between the entries in column I and column II are :

	I		II
	Radiation		Wavelength
a	Microwave	i	$100 m$
b	Gamma rays	ii	${10}^{-15}\mathrm{m}$
c	A.M. radio	iii	${10}^{-10}\mathrm{m}$
d	X–rays	iv	${10}^{-3}\mathrm{m}$

 

• A

  (a)–(ii), (b) – (i), (c) – (iv), (d) – (iii)
• B

  (a)–(i), (b) – (iii), (c) – (iv), (d) – (ii)
• C

  (a)–(iii), (b) – (ii), (c) – (i), (d) – (iv)
• Correct answer
  D

  (a)–(iv), (b) – (ii), (c) – (i), (d) – (iii)

Hence, the correct answer is option: 'D'.