SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-3

  • question_answer
    The left aortic arch is observed in

    A)  Amphibians                  

    B)  Mammals  

    C)  Reptiles

    D)         Aves

    Correct Answer: B

    Solution :

     The fourth right arch forms the right sub-clavian as far as the origin of its internal mammary branch; while the fourth left arch constitutes the arch of the aorta between the origin of the left carotid artery and the termination of the ductus arteriosus.


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