$(a)\;28 \\ (b)\;30 \\ (c)\;32 \\ (d)\;34 $

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We see that each triangle is an equilateral triangle, the side of the triangle is $0.2/ \sqrt {3}$.

Number of reflections $= \large\frac{2 \sqrt 3}{\Large\frac{0.2}{\sqrt 3}}$

$\qquad= 30$

Hence b is the correct answer.

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