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Movement of Ca²⁺ out in sarcoplasmic reticulum after contraction stops the interaction of actin and myosin complex actomyosin due to which muscle contraction and relaxation takes place. Albert Szent Gyorgyi worked out biochemical events of muscle contraction.

1. Movement of Ca²⁺ out in sarcoplasmic reticulum after contraction stops the interaction of actin and myosin complex actomyosin.
2. Due to which muscle contraction and relaxation takes place.
3. Albert Szent Gyorgyi worked out biochemical events of muscle contraction.
4. All of the above.

Correct answer: All of the above.

Solution

The prompt presents three statements about muscle contraction/relaxation and Albert Szent-Gyorgyi, and the keyed answer indicates all are accepted as correct. Therefore the option that combines all statements is the right choice.

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