<prompt> Clergymans knee is due to involvement of: RepeatInfrapatellar bursaSuprapatellar bursaPrepatellar bursaSemimembranous bursa  <response>: Ans: A Infrapatellar bursa Ref: Apleys Orthopedics, 9th ed.Explanation:Infrapatellar bursitis clergymans kneeIt is the inflammation of the infrapatellar bursa, which is located just below the patella.It is often called clergymans knee due to its historical frequency amongst clergyman, who injured the bursa by kneeling on hard surfaces during prayer.Prepatellar bursitisAlso known as heat knee, carpet layers knee, coal miners knee, housemaids knee, rug cutters knee, or nuns kneeIt is an inflammation of the prepatellar bursa at the anterior to patella.It is marked by swelling at the knee, which can be tender to the touch but which does not restrict the knees range of motion.It is most commonly caused by trauma to the knee by chronic trauma over a period of time.As such, prepatellar bursitis commonly occurs among individuals whose professions require frequent kneeling. 