(A) : The value of ${\mathrm{R}}_{\mathrm{H}}=2.18\times {10}^{-18}\mathrm{J}$.
(R) : The energy of a light wave is directly proportional to $\mathrm{\lambda }$.

Both ‘A’ and ‘R’ are true and ‘R’ is the correct explanation of ‘A’.

Both ‘A’ and ‘R’ are true and ‘R’ is not the correct explanation of ‘A’

‘A’ is true but ‘R’ is false

Both 'A' and 'R' are false