Solution
Let the angle = $$\theta$$
Its complementary angle = $$(4\theta)$$
Sum of an angle and its complementary angle = 90°
=> $$\theta + (4\theta) = 90$$°
=> $$5 \theta = 90$$°
=> $$\theta = \frac{90}{5} = 18$$°
$$\therefore$$ Measure of the angle = $$4 \times 18 = 72$$°
=> Ans - (A)
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