Which of the following solutions will have $pH$ of 4.74?

Question

(a) 100 mL of 1 M $CH_3COOH$ ($pK_a = 4.74$) at the equivalence point using 1 M NaOH

(b) 50 mL of 1 M $CH_3COONa$ + 25 mL of 1 M HCl

(c) 50 mL of 1 M $CH_3COOH$ + 25 mL of 1 M NaOH

(d) Both (b) and (c)