Which statement is the best example of pseudoscience?

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

What is the indicator of the number of ions in solution? the amount of conductivity the amount of precipitate the amount of solute added