Answers

2014-08-12T15:00:14+05:30
B.) mm of Hg or mm of mercury..is the least pressure in the above list.
1 1 1
2014-08-12T15:05:05+05:30
Answer :(B)mm of mercury(Hg)
1 Pa < 1 torr = 1 mm Hg < 1 in Hg < 1 atm


1 Pa Pascal = 1 N/m(The SI unit)
1 Tor= 1 mm Hg = 133.3 Pa ≈ 1 kPa
1 atm = 760 mm Hg 
0
Mark me as brainiest if u find it more useful :)