In the following passage some words have been deleted. Fill in the blank with the help of the alternatives given. Select the most appropriate option for each number.

At the core of the (1) __________ lies the fierce (2) __________ between two branches of the Kuru dynasty, the Pandavas and the Kauravas. The lifelong struggle (3) __________ the cousins for the throne of Hastinapur culminates (4) __________ bloody battle of Kurukshetra, in which (5) __________ kings of that period participated and perished.