Final answer:
A surgeon's knot uses a C) double half hitch for the first throw, providing extra security during suturing.
Step-by-step explanation:
The question pertains to a type of knot used in surgical procedures. A surgeon's knot is one with a double half hitch for the first throw. This is opposed to a single or reverse half hitch.
The use of a double half hitch in the first throw of a surgeon's knot provides additional security and is commonly employed when suturing, to ensure that the knot will hold better before the final knot is tied.