Atomic structure — practice question

Which statement concerning $^{131}_{53}\text{I}$ is correct?

• AA negative ion of $^{131}_{53}\text{I}$ contains $53$ neutrons and $52$ electrons.
• BA negative ion of $^{131}_{53}\text{I}$ contains $53$ neutrons and $54$ electrons.
• CA negative ion of $^{131}_{53}\text{I}$ contains $78$ neutrons and $52$ electrons.
• DA negative ion of $^{131}_{53}\text{I}$ contains $78$ neutrons and $54$ electrons.