Which of the following statements about the m | vedclass

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(D) Statement $I$ is correct: Each thin filament (actin) is composed of two $F$-actin filaments.Statement $II$ is correct: $F$-actin is a polymer of m

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All except $IV$

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(D) Statement $I$ is correct: Each thin filament (actin) is composed of two $F$-actin filaments.Statement $II$ is correct: $F$-actin is a polymer of monomeric $G$-actin (globular actin) proteins.Statement $III$ is correct: These two $F$-actin filaments are twisted into a double helix structure.Statement $IV$ is correct: Two filaments of another protein,tropomyosin,run close to the $F$-actin throughout its length.Since all statements $I, II, III,$ and $IV$ are correct,none of the provided options perfectly match the standard biological fact. However,based on the structure of the question,if we evaluate the options provided,there is a discrepancy. Re-evaluating: All statements are factually correct according to $NCERT$. Given the options,if the question implies selecting the set of correct statements,all are correct.

Column-$I$	Column-$II$
$P$. Skeletal muscle	$I$. Biceps
$Q$. Smooth muscle	$II$. Iris
$R$. Cardiac muscle	$III$. Heart

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