In the following sentence, four words printed in bold are given. One of these words printed in bold might either be wrongly spelt or inappropriate in the context of the sentence. Find out which word that is inappropriate or wrongly spelt, if any. If all of the words in bold are correct, then mark 'No error' as your answer.

Susceptibility to chronic diseases, such as artheritis, diabetes, and hypertension increases during middle adulthood.