Identify the correct statements and find out the correct combination ? 1. Accumlation of `K^(+)` ions in guard cells does not require energy 2. A high pH favours stomatal opening 3. Movemant of chloride ions into guard cells is in response to electrical differential created by `K^(+)` ions 4. With entry of several `K^(+)`ions and chloride ions, water potential of guard cells increases .