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The 'A' band in myofibril occupies:

[A].	2/3rd of length of sarcomere so that muscle shortens by 1/3rd of its length during contraction	[B].	1/3rd of length of sarcomere so that muscle shortens by 2/3rd of its length during contraction
[C].	1/2 of length of sarcomere so that the muscle shortens 1/2 of it	[D].	3/4th of the length of sarcomere so that the muscle shortens by 1/4th of its length during contraction

Answer: Option A