Why is ferric chloride preferred over potassium chloride in case of a cut leading to bleeding?

Question

$\begin{array}{1 1} \text{(a) $Fe^{3+}$ is a better coagulating ion due to Neutral charge on it.} \\ \text{(b) $Fe^{3+}$ is a better coagulating ion due to greater Negative charge on it-} \\ \text{(c) $Fe^{3+}$ is a better coagulating ion due to greater positive charge on it.} \\\text{(d) $Fe^{3+}$ is a better coagulating ion due to lesser positive charge on it-} \end{array} $