The resistances of the various arms of Wheatstone bridge are P = 500 ohm, Q = 50 ohm, R = 1010 ohm and S = 100 ohm. The emf of the batter is 5 V and the current sensitivity of galvanometer is 8 mm / μ A. If the internal resistance of the galvanometer is 80 ohm then the deflection of galvanometer and the sensitivity of the bridge in terms of deflection per unit change of resistance are

• A. 151.2 mm, 30.24 mm / ohm
• B. 100 mm, 21.03 mm / ohm
• C. 186 mm, 40.37 mm / ohm
• D. 193 mm, 20.74 mm / ohm