Comparison of Lixisenatide Injected Prior to the Main Meal of the Day Versus Prior to Breakfast in Type 2 Diabetic Patients on Metformin

Primary Objective: \- To compare the two treatment regimens in terms of change of glycosylated hemoglobin (HbA1c) from baseline to endpoint (Week 24) Secondary Objective: * To assess the effect of the 2 lixisenatide regimens on: * The percentage of participants who reached the target of HbA1c \< 7% or ≤ 6.5% at Week 24 * Fasting Plasma Glucose (FPG) * 7-point Self-Monitored Plasma Glucose (SMPG) profiles * Body weight * To assess the safety and tolerability of the 2 lixisenatide regimens