Only option C has the correct spelling. 'Modern' means relating to the present or recent times as opposed to the remote past.

The correctly spelt word is “Engineer” which means a persons who designs , builds or maintains engines , machines or structures

Hence, option A is the correct answer.

Option A has the correctly spelt word. “Noticeable” which means easy to see or recognize.

 Option A has the incorrectly spelt word. The correct spelling is "idiosyncrasy" which means a person’s particular way of behaving, thinking, etc., especially when it is unusual; an unusual characteristic.

Other words and their meanings:

Recalcitrant = refusing to follow instructions or rules; not easy to control

Exhilaration = excitement.

Conscientious = careful.

Option A has the wrongly spelt word. The correct spelling of the word is “aggressive” which means violent.

Other words and their meanings:

Agitation = spur, worry and anxiety

Agriculture = farming

Agreement = the situation in which people have the same opinion, or in which they approve of or accept something

The meanings of the other words are:

Judiciary: the judicial authorities of a country; judges collectively.

Virtual: almost or nearly as described, but not completely or according to strict definition.

Appreciate: recognize the full worth of.

Hence, option C is the correct answer.

Option D has the incorrectly spelt word. Its correct spelling is "sustenance" which means something that gives support, help, or strength. 

Other words and their meanings are:

Secondary = coming after, less important than, or resulting from someone or something else that is primary

Sizable = fairly large

Succumb = fail to resist pressure, temptation, or some other negative force

Option B has incorrectly spelt word.

“Photograph” is the correct spelling of the incorrect word “Photgraph”. It means a picture that is made by using a camera that stores images in digital form or that has a film sensitive to light inside it.

The meaning of other words are:

Boundary: a real or imagined line that marks the limits.

Processing: the treatment of raw material in order to change it, preserve it etc.

Competency: the ability to do something well.