Which one among the following rotors is mostly used in wind turbines for electricity generation?

Propeller-type rotors, mounted on horizontal-axis turbines with two or three aerodynamic blades, are the workhorse of grid electricity generation.

Multiblade rotors with many metal vanes give high starting torque and are used to pump water, not to spin fast enough for efficient power.

Savonius rotors are drag-driven vertical-axis machines that turn slowly and suit ventilation or small-scale use.

Darrieus rotors are lift-driven vertical-axis eggbeater designs with limited commercial power deployment.

High rotational speed and good efficiency make the propeller design ideal for large megawatt turbines.

Modern utility turbines commonly use three-bladed upwind propeller rotors.