Two waves from coherent sources meet at a point in a path difference of $∆\mathrm{x}$. Both the waves have same intensities $I_0$. Match the following two columns.

Column I	Column II
$\text{ (a) If }\mathrm{\Delta x}=\mathrm{\lambda }/3$	(p) Resultant intensity will become three times of $I_0$
$\text{ (b) If }\mathrm{\Delta x}=\mathrm{\lambda }/6$	(q) Resultant intensity will remain same as that of $I_0$
$\text{ (c) If }\mathrm{\Delta x}=\mathrm{\lambda }/4$	(r) Resultant intensity will become two times of $I_0$
$\text{ (d) If }\mathrm{\Delta x}=\mathrm{\lambda }/2$	(s) Resultant intensity will become zero

• A

  (a) $\to$q, (b) $\to$p, (c) $\to$s, (d) $\to$r

• B

  (a) $\to$q, (b) $\to$p, (c) $\to$r, (d) $\to$s

• C

  (a) $\to$p, (b) $\to$q, (c) $\to$r, (d) $\to$s

• D

  (a) $\to$q, (b) $\to$r, (c) $\to$p, (d) $\to$s