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All of the following statements are false except

[A].	In a flange coupling, the bolts are subjected to compressive stress	[B].	The resilience of a bolt may be increased by decreasing its shank diameter
[C].	Oldham coupling is used for connecting piston rod of a steam engine to the cross head	[D].	The pitch of a sinle threaded screw is equal to the lead

Answer: Option D