A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively

• A. .5 N/mm² and 30°
• B. .05 N/mm² and 0°
• C. .2 N/mm² and 0°
• D. .05 N/mm² and 45°