Final answer:
Polypropylene is the suture material typically used to fixate the testicle in surgical procedures, due to its non-absorbable nature and lower risk of infection compared to other materials. The correct option is 4).
Step-by-step explanation:
The suture material to be used for fixating the testicle during surgical procedures needs to be non-absorbable due to the requirement of long-term support.
The options given are Silk, Nylon, Polypropylene, and Catgut. Out of these, Catgut is absorbable and will degrade too quickly to provide long-term support. Silk, although non-absorbable, is not generally chosen for internal surgical procedures as it can provoke an immune response.
On the other hand, Nylon and Polypropylene are both synthetic, non-absorbable suture materials suitable for the purpose.
However, between the two, Polypropylene is often preferred due to its lower rate of infection and it being less prone to degradation over time compared to Nylon. Option 4) is the correct one.