What Is the Smallest Energy Photon That a Hydrogen Atom $3.40 \mathrm{eV}$

Multiple Choice

What is the smallest energy photon that a hydrogen atom in the ground state can absorb?

A) $3.40 \mathrm{eV}$
B) any energy
C) $1.90 \mathrm{eV}$
D) $13.6 \mathrm{eV}$
E) $10.2 \mathrm{eV}$