Is it true that parish priests generally came from the nobility bishops and other highly placed clergy came from the peasantry?

No, that statement is generally inaccurate. Historically, parish priests often came from the lower or middle classes, including the peasantry, while bishops and higher-ranking clergy were more likely to be from the nobility or wealthy families. This trend was due to the financial requirements of higher ecclesiastical positions, which often necessitated connections and resources not typically found among the peasantry.