Match the following:

	Column$-\mathrm{I}$		Column$-\mathrm{II}$
(a)	Transverse wave through a steel rod	(i)	$\sqrt{B+\left(\frac{4}{3}\right)\frac{\eta }{\rho }}$
(b)	Longitudinal waves in earth's crust	(ii)	$\sqrt{\frac{\eta }{\rho }}$
(c)	Longitudinal waves through a steel rod	(iii)	$\sqrt{\frac{2\pi T}{g\lambda }}$
(d)	Ripples	(iv)	$\sqrt{\frac{\lambda }{\rho }}$

• Correct answer
  A

  $(a-ii),(b-i),(c-iv),(d-iii)$
• B

  $(a-i),(b-iii),(c-iv),(d-ii)$
• C

  $(a-iii),(b-iv),(c-i),(d-ii)$
• D

  $(a-ii),(b-iv),(c-i),(d-iii)$

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