Ge and Si diodes conduct at 0.3 V and 0.7 V respectively. In the following figure if Ge diode connection are reversed, the valve of V0 changes by [Based on Roorkee 2000]

• A.            0.2 V                                        
• B.            0.4 V
• C.            0.6 V                                        
• D.            0.8 V