"Abbreviation" means a shortened form and "short form" is a synonym making option A correct. Other options are incorrect. Synonym knowledge enhances vocabulary useful in writing or speaking. Choosing the right synonym ensures precise expression especially in technical or formal contexts. This skill is vital for professional communication. Accurate synonyms convey concepts effectively particularly in documents or reports where precise language enhances clarity and impact in describing terms or formats.

"Facsimile" means a copy and its antonym "original" means the authentic item making option C correct. Other options are unrelated. Antonym knowledge enhances vocabulary useful in writing or speaking. Contrasting ideas clarify descriptions especially in technical or artistic contexts. This skill is vital for professional communication. Accurate antonyms convey contrasting qualities effectively particularly in reports or critiques where precise language enhances clarity and impact in describing authenticity or copies.

"Depended on" and "at the railway station" fit the sentence for reliance and location making option B correct. Other options misuse prepositions. Proper preposition usage ensures clarity especially in descriptive writing or narratives. This skill is vital for professional communication. Accurate prepositions convey relationships or locations effectively particularly in stories or reports where precise language enhances clarity and engagement in describing interactions or settings.