With two forces acting at a point, the maximum effect is obtained when their resultant is $4 \mathrm{~N}$. If they act at right angles, then their resultant is $3 \mathrm{~N}$. Then the forces are

• A

  $(2+\sqrt{2}) N$ and $(2-\sqrt{2}) N$
• B

  $(2+\sqrt{3}) \mathrm{N}$ and $(2-\sqrt{3}) \mathrm{N}$
• Correct answer
  C

  $\left(2+\frac{1}{2} \sqrt{2}\right) \mathrm{N}$ and $\left(2-\frac{1}{2} \sqrt{2}\right) \mathrm{N}$
• D

  $\left(2+\frac{1}{2} \sqrt{3}\right) \mathrm{N}$ and $\left(2-\frac{1}{2} \sqrt{3}\right) \mathrm{N}$

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