1) Which of the following statements about infection-related acute glomerulonephritis are correct?

a) Viral infections are most commonly implicated
b) Smokey urine is suggestive of post-streptococcal glomerulonephritis
c) Haemolytic-uraemic syndrome occurs after infection with E. coli 0157
d) Post-streptococcal glomerulonephritis should be treated with corticosteroids
e) Angiotensin converting enzyme inhibitors (ACE inhibitors) are contra-indicated in all patients with renal failure