Does the radial artery,ulnar artery,and brachial artery all contain artery blood which is required for abg blood test?can blood b taken from any of these for abg tests?

Yes, all these branches contain arterial blood. Usually the radial artery is used since the radial and ulnar come into a network as blood perfuses down into the fingers. If there was a misadventure, one of these could be sparred. There is no good "spare" for the brachial artery. Hope that helps.

Radial artery is usual target for arterial blood sample. Before taking the sample a simple test is done to ensure that ulnar artery is patent and can provide blood to the hand in case of mishap to the radial artery.