Answer : The correct option is, (B) 273.15 K and 1 atm
Explanation :
STP : STP stands for standard temperature and pressure.
STP conditions :
The temperature is, 
or 
or 
The pressure is, 
or 
The volume is 22.4 L for 1 mole of a substance.
Hence, the correct option is, (B) 273.15 K and 1 atm
D, It is a flow of protons, is the best answer. Electricity is the flow of electrons, not protons.
The law of conservation of mass states that matter cannot be created nor destroyed the answer would be D. It remains the same
D would be your best bet because evaporation occurs when water is heated, it then vibrates and then magic!
