You measure two quantities as A = 1.0 m ± 0.2 m,

You measure two quantities as A = 1.0 m ± 0.2 m, B = 2.0 m ± 0.2 m. We should report correct value for √AB  as

(a) 1.4 m± 0.4 m

(b) 1.41 m± 0.15 m

(c) 1.4 m + 0.3 m

(d) 1.4 m± 0.2 m