Preparation of buffer solution of acetic acid and sodium acetate and determination of ph

An acetic acid and sodium acetate buffer has pH = 4.76. The ratio of concentrations of [OAc]/[HOAc] is: pka of acetic acid = 4.76

6 : 1
4 : 3
1 : 1
4 : 1

Option 3 : 1 : 1