Arch of aoa develops from:

Ans. Ans. C: Left fouh aoic arch aeryThe fouh aoic arch persists on both sides, but its ultimate fate is different on the right and left sides.On the left it forms pa of the arch of the aoa, between the left common carotid and the left subclan aeries.On the right it forms the most proximal segment of the right subclan aery, the distal pa of which is formed by a poion of the right dorsal aoa and the seventh intersegmental aery