In the analysis of a closely coiled helical spring under axial load, which of the following is/are negligible?

1. Torsion

2. Bending

3. Axial force in the wire

Select the correct answer using the codes given below

Codes:

- 1
  
  $1$ alone
- 2
  
  $2$ and $3$
- 3
  
  $1$ and $2$
- 4
  
  $1$ and $3$

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