What is the boiling point at standard atmospheric pressure at sea-level and 45° latitude of water on the Celsius scale?

100°C

The correct answer is option (4) 100°C.

The boiling point of water at standard atmospheric pressure at sea level and 45° latitude is 100°C.

Water boils at 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure, which is equivalent to sea level. The boiling point can vary with altitude, but at sea level, it is commonly accepted as 100°C.