The stress-strain curve for mild steel is shown in the figure given below.Choose the correct option referring to both the figure and table.A point on the graphDescription of the pointP1. Upper yield pointQ2. Ultimate tensile strengthR3. Proportional limitS4. Elastic limitT5. Lower yield pointU6. Failure

• A. P – 1, Q – 2, R – 3, S – 4, T – 5, U – 6
• B. P – 3, Q – 1, R – 4, S – 2, T – 6, U – 5
• C. P – 3, Q – 4, R – 1, S – 5, T – 2, U – 6
• D. P – 4, Q – 1, R – 5, S – 2, T – 3, U – 6