Which one of the following has vasodilator effect.. Nicotine

publisher :NIL NAM -May 23, 2017

Which one of the following has vasodilator effect?
a- Nicotine***
b- Cholestyramin.
c- Urikinase.
d- Vitamin A.

Five ml of a colored solution has an absorbance of 0.500. The absorbance of 10ml of the same colored solution will be.. 0.500