What is the most common type of bone tumor?

The most common presenting symptom of patients with Wilms’ tumor is:

Which of the following components make up the outer surface of the bone?

Tanning of the skin in the treatment area after a course of radiation therapy is caused by:

Which of the following is a benign tumor of the CNS?

All of the following cancers have a curative dose in the range of 65-80 Gy except: 

Which of the following relationships is generally true between the three types of itemsets (maximal, closed, and generator) in terms of size (number of itemsets generated)? 

Which of the following is true about generator itemsets?   

Why are closed itemsets often preferred over maximal itemsets in certain data mining applications? 

What does a large eigenvalue in PCA indicate?