522. For a normal healthy person, the daily requirement of vitamin C is:

A.   10 to 50 mg                              B. 50 to 100 mg

C.   100 to 200 mg                          D. 200 to 300 mg

Which of the following are risk factors for deep venous thrombosis? 1. Duration of surgery more than 30 minutes 2. Prior history of venous thrombosis 3. Age less than forty years 4. Obesity Select the correct answer using the codes given below: Codes:

A.   1, 2 and 3  B. 1, 2 and 4  C. 2, 3 and 4  D. 1, 3 and 4

520. The lamina propria is:

 A.  epithelial tissue 
 B.  connective tissue 
 C.  adipose tissue 
 D.  muscle tissue