उच्च-शीर्ष (high-head) जलविद्युत संयंत्रों में किस जल टरबाइन का उपयोग किया जाता है?

In a hydropower plant, the function of a penstock is to: (i) Carry water from the reservoir to the turbine (ii) Convert potential energy of water into kinetic energy (iii) Convert potential energy of water into electrical energy (iv) Act as a pressure neutralizer if a surge tank is provided Choose the correct answer:

Consider the following statements regarding hydroelectric power plant components and turbines: A. Run-of-the-river plants generally operate using natural flow stream and do not have massive storage reservoirs. B. Francis turbines are reaction turbines best suited for medium head and variable load conditions. C. Kaplan turbines are axial flow reaction turbines typically used in high head and high discharge conditions. D. Pelton turbines are impulse turbines ideal for low head and high flow conditions. Which of the statements given above are correct?