The following parameters are to be calculated while designing screw jack
1. Core diameter of screw
2. Torque required to rotate the screw
3. Principal stresses
4. Height of the nut
The correct sequence of the calculation of these parameters is
(a) 1,2,4,3 (b) 1,2,3,4
(c) 2,1,3,4 (d) 2,1,4,3