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There is a horizontal film of soap solution. On it a thread is placed in the form of a loop. The film is punctured inside the loop and the thread becomes a circular loop of radius \( R \). If the surface tension of the soap solution be \( T \), then the tension in the thread will be
(a) \( \pi R^{2} / T \)
(b) \( \pi^{2} R^{2} T \)
(c) \( 2 \pi R T \)
(d) \( 2 R T \)
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