Arterial blood pressure in human beings is:
1.  120 and 80 mm Hg
2.  150 and 100 mm Hg
3.  50 and 100 mm Hg
4.  None of the above

The reason why hair loss is more in old age:

1. Reduction of blood supply

2. Decrease in protein synthesis

3. Low energy production

4. Reduced storage of glycogen

Lead concentration in blood is considered alarming if it is:

1. 30 µg/100 ml

2. 4-6 µg/100 ml

3. 10 µg/100 ml

4. 20 µg/100 ml