The correct answer is: A. Sargeant

The correct spelling of the word is "sergeant".

A sergeant is a non-commissioned officer in the military, ranking above a corporal and below a warrant officer. The word "sergeant" comes from the Old French word "serjant", meaning "servant".

The word "sargeant" is a misspelling of the word "sergeant". It is a common misspelling, and it is often used in informal speech. However, it is not the correct spelling of the word.

The words "shallot" and "shackle" are both spelled correctly. A shallot is a type of onion, and a shackle is a device used to restrain someone or something.

The word "shellac" is also spelled correctly. Shellac is a resin that is used to make a type of varnish.