Correct Answer: Option D

Explanation

Let the distance apart the two masses = m.
From the equation F & M₁ m₂/ϒ²
F₁ α 10 x 10/ϒ² = F α 100/ ϒ²
F² α 10 X 10/(3ϒ)² => F² α 100/9ϒ²
therefore F²/F¹ = 100/9ϒ²/100/ϒ² = 100/9ϒ² ϒ²/100 = 1/9
Therefore F ₂ : F ₁ = 1 : 9

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