Right option is (b) (Atgfy/ γm0)+(0.9Avnfu/√3 γm1)
The best explanation: The block shear strength at an end connection for shear fracture and tension yield is given by Tdb2 = (Atgfy/ γm0)+(0.9Avnfu/√3 γm1), where Avn = minimum net area in shear along line of action of force, Atg = minimum gross area in tension from hole to toe of angle or last row of bolts in plates perpendicular to line of force, fy and fu are yield and ultimate stress of material respectively, γm1 = 1.25, γm0 = 1.10.