According to Irving-Williams series, the number of d electrons for the first row transition metal (M) ion having the highest overall stability constant $(\log \beta)$ for $\mathrm{[M(EDTA)]^{2-}}$ is ____
Answer
Answer (as printed): 9
The options are missing from the source scan for this question, so there is nothing here for this letter to point at. The letter is what the book printed.