Find the rationalisation factor
\[ \sqrt{3} \]
Solution:
\[ \text{Rationalisation factor of } \sqrt{3} = \frac{1}{\sqrt{3}} \]
\[ \because \sqrt{3} \times \frac{1}{\sqrt{3}} = 1 \ (\text{a rational number}) \]
\[ \therefore \text{Correct Answer: } \frac{1}{\sqrt{3}} \ (\text{Option b}) \]