The correct answer is: a) Heikru Hidongba.
Heikru Hidongba is a Manipuri festival marked by boat races and water sports. It is celebrated every year in the month of May to commemorate the victory of the Meitei people over the Burmese invaders. The festival is held at the Imphal River and features a variety of boat races, as well as other water sports such as swimming and diving.
Lai Haraoba is a Manipuri festival that celebrates the marriage of the Meitei gods and goddesses. It is celebrated every year in the month of April or May. The festival features a variety of rituals and dances, as well as feasting and merrymaking.
Gang-Ngai is a Manipuri festival that celebrates the harvest. It is celebrated every year in the month of November or December. The festival features a variety of rituals and dances, as well as feasting and merrymaking.
Lui-Ngai-Ni is a Manipuri festival that celebrates the new year. It is celebrated every year in the month of April or May. The festival features a variety of rituals and dances, as well as feasting and merrymaking.