In postductal coarctation of aoa, collaterals may be formed by all of the following, except: (A) Veebral aery, (B) Suprascapular aery, (C) Subscaular aery, (D) Posterior Intercostals aery
Answer is A. In post-ductal coarctation of the aoa, an extensive collateral circulation develops involving the branches of subclan & axillary aeries with the distal aeries given by aoa Veebral aery does not play a significant role in this collateral circulation. Ref: Gray's 40e/p984