Which of the following are true regarding asbestos-related diseases?

Which of the following are true regarding asbestos-related diseases?
a) Asbestos-related pleural plaques frequently spare the mediastinal surface
b) Asbestos-related pleural plaques do not extend into interlobular fissures
c) Isolated pleural effusion is a feature
d) Subpleural lower lobe fibrosis is typical of asbestosis
e) Asbestosis is associated with calcified pleural plaques in 20% of cases