JEE Main 2020 Physics question

A physical quantity z depends on four observables a, b, c and d, as . The percentage of error in the measurement of a, b, c and d 2%, 1.5%, 4% and 2.5% respectively. The percentage of error in z is:

• (A)12.25%
• (B)14.5%Correct
• (C)16.5%
• (D)13.5%