Heart and blood vessels have been formed by the end of five weeks of pregnancy.

True

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False

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Solution

The correct option is A True
Heart, blood vessels, blood and gut start forming by the end of fourth week of pregnancy. By the end of fifth week, the heart is developed as a large tube and it starts beating and pumping blood. This can be seen by ultrasound.
Hence, the statement given in the question is 'True'.

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