ratio of hoop stress to longitudinal stress in the shell

Question

A long thin walled cylindrical shell, closed at both the ends, is subjected to an internal pressure.
The ratio of the hoop stress (circumferential stress) to longitudinal stress developed in the shell is

(a) 0.5                          (b) 1.0
(c) 2.0                          (d) 4.0

Answer 1

answer is OPTION C