How can be the pressure drop across the skin is calculated (all signs have their original meanings)?

How can be the pressure drop across the skin is calculated (all signs

1.	How can be the pressure drop across the _skin is calculated (all signs have their original meanings)?
A.	P<sub>skin</sub>= 141.2q Bs/kh
B.	P<sub>skin</sub>=141.2qkh/ Bs
C.	P<sub>skin</sub>=141.2q ks/Bh
D.	P<sub>skin</sub>=162.2q Bs/kh
Answer» B. P<sub>skin</sub>=141.2qkh/ Bs