Which one is a compound noun?

PSC Biman – Traffic Helper English Noun clause Noun Phrase Compound noun Uncountable Noun Countable Noun Abstract Noun Material Noun Collective Noun Common Noun Proper Noun The Noun

SBAC SBAC Bank – Trainee Junior Officer English Noun clause Noun Phrase Compound noun Uncountable Noun Countable Noun Abstract Noun Material Noun Collective Noun Common Noun Proper Noun The Noun

PSC Mymensingh PBS – Meter Reader/Messenger English Noun clause Noun Phrase Compound noun Uncountable Noun Countable Noun Abstract Noun Material Noun Collective Noun Common Noun Proper Noun The Noun

PSC Manikganj PBS – Meter Reader/Messenger English Noun clause Noun Phrase Compound noun Uncountable Noun Countable Noun Abstract Noun Material Noun Collective Noun Common Noun Proper Noun The Noun

PSC Netrokona PBS – Meter Reader/Messenger English Noun clause Noun Phrase Compound noun Uncountable Noun Countable Noun Abstract Noun Material Noun Collective Noun Common Noun Proper Noun The Noun

PSC Railway – Pointsman English Noun clause Noun Phrase Compound noun Uncountable Noun Countable Noun Abstract Noun Material Noun Collective Noun Common Noun Proper Noun The Noun