The correct answer is Mustard.
Mustard is a major kharif crop in Himachal Pradesh. It is a winter annual crop that is grown during the monsoon season. Mustard is a major source of edible oil and is also used in the production of mustard oil cake, which is a valuable fertilizer.
Wheat is a major rabi crop in Himachal Pradesh. It is a winter crop that is grown during the winter season. Wheat is a major source of food and is also used in the production of flour, bread, and other baked goods.
Maize is a major kharif crop in many parts of India, but it is not a major crop in Himachal Pradesh. Maize is a summer crop that is grown during the monsoon season. Maize is a major source of food and is also used in the production of corn flour, cornmeal, and other corn products.
Ginger is a major kharif crop in some parts of India, but it is not a major crop in Himachal Pradesh. Ginger is a tropical crop that is grown during the summer season. Ginger is a major source of spice and is also used in the production of ginger ale, ginger beer, and other ginger products.