Which form of Newton's second law of motion is most general?

1. Newton's second law states that the rate of change of momentum equals the applied force. 2. In symbols, F = dp/dt. 3. When mass is constant, this reduces to F = m·a. 4. The momentum form covers cases where mass changes (e.g. rockets) as well. 5. So the general statement is that force equals the rate of change of momentum. 6. Options C and D conflate force with kinematic or energetic quantities. _Source: Selina Concise Physics ICSE Class 9, Ch 3 'Laws of Motion' (aplustopper.com extract)_