Can pear (nashpati) be grown commercially in the plains and which type is for the hills?

Both are true because pear has two broad groups. The soft, juicy European pears (such as Bartlett and similar) are high-chill and grow in the temperate hills of Himachal, Kashmir and Uttarakhand. The hardy, gritty, crisp low-chill pears, mainly the sand pear types like Patharnakh (Patharnaakh), and improved low-chill selections, grow very well in the subtropical plains of Punjab, Haryana and north India, which is why pear is a successful commercial fruit in Punjab. So for your plains location, plant a low-chill sand pear type such as Patharnakh or a recommended low-chill variety; a European pear would not get enough chilling and would flower poorly. Pears generally need a compatible pollinizer variety for good set, so plant pollinizers and keep bees. Patharnakh is a heavy, reliable bearer with good keeping and transport quality, which makes it a dependable commercial crop in the plains. Choose the right variety and pollinizer for your area with your KVK or horticulture department.