<prompt> DNA repair defect is seen inXeroderma pigmentosaBlooms syndromeAtaxia telangiectasiaAll of these  <response>: Examples of DNA repair defects : 1 Xeroderma pigmentosa, 2 Ataxia telangiectasia, 3 Fanconis anaemia, 4 Blooms syndrome, 5 HNPCC. 