Which of the following statements are correct about an aqueous solution of an acid and of a base?

Question

$\begin{array}{1 1} \text{(a) lower the pH weaker the base} \\ \text{ (b) Lower the pH stronger the base} \\ \text{ (c) higher the pH stronger the acid} \\ \text{ (d) higher the pH weaker the acid} \end{array}$