Consider the following statements regarding synchronous machines:1. When a synchronous motor is over-excited, its back emf is greater than the supply voltage2. When a synchronous motor is over-excited, its power factor is leading3. Synchronous motor is used as capacitor where load is so large that construction of a static capacitor is impracticalWhich of these statements are correct?

• A. 1 and 2
• B. 1 and 3
• C. 2 and 3
• D. 1, 2 and 3