The Romans did not invent the lollipop. It was invented in the 19th century. George Smith claimed to be the first to invent the modern lollipop in 1908 and trademarked the lollipop name in 1931.
The Romans didn't invent the microscope
The Romans invented aqueducts, battlefield surgery, concrete, newspapers, and many more things.
Neither, obsidian mirrors were first discovered in Anatolia (modern-day Turkey).
The Romans invented concrete.
The Romans invented or improved a long, long list of things, but you only asked for four, so here they are: Concrete, the Dome, Central Heating, the Taxi Meter.
The Romans invented concrete.
No.
No.
No.
No.
no