Give five types of exceptional children and what causes that exceptionalities?

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http://books.google.com.ng/books?id=XyYPIr120ZcC&pg=PA439&lpg=PA439&dq=types+of+exceptional+children&source=bl&ots=HBHmw8JCq5&sig=jbZRDYS-5O8tqNFQhGhoOZUu6Qg&hl=en&ei=az-USqfnIZDDlAfx3cSdDA&sa=X&oi=book_result&ct=result&resnum=10#v=onepage&q=types%20of%20exceptional%20children&f=false