In aseptic handwashing, special attention should be paid to this area because it can harbor multiple microorganisms.

Correct Answer: C

Rationale: Under the fingernails is a common area for microorganisms to accumulate, requiring special attention during aseptic handwashing.

Correct Answer: B

Rationale: Sunlight is not a method of moist heat sterilization; it is not a controlled heat-based process.

Correct Answer: D

Rationale: The sigmoid colon is a hollow organ, not a solid organ.

Correct Answer: D

Rationale: Blade size 50 is not a standard surgical blade.

Correct Answer: A

Rationale: Granny knots are less secure and prone to slipping.