Which of the following can act as an intragenic suppressor mutation to a Frame shift mutation?

Which of the following can act as an intragenic suppressor mutation to a Frame shift mutation? Correct Answer Another frame shift mutation

If overall the two frame shift mutations lead to a change of 3 or its multiple in the genetic code, the codons will again be in the same frame. This is an internal compensation, so intragenic suppression.

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A rod of length L0 makes an angle θ0 with the Y-axis in its rest frame while the rest frame moves to the right along the X-axis with relativistic speed v with respect to lab frame. If $$\gamma = {\left( {1 - \frac{{{v^2}}}{{{c^2}}}} \right)^{ - \frac{1}{2}}},$$    the angle in the lab frame is