Solution
Cot 60°- Sec 45° = $$\frac{1}{\sqrt{3}}-\sqrt{2}=\frac{1-\sqrt{6}}{\sqrt{3}} \times \frac{\sqrt{3}}{\sqrt{3}}$$ = $$\frac{\sqrt{3}-3\sqrt{2}}{3}$$
so the answer is option B.
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