The correct options are
A The kings maintained his own army.
B Calvary, archers and horses were the important part of the army.
C The land revenue was set at 1/4 of the produce.
During the reign of Guptas, the king was all-powerful but the rule was still feudatory. Most of the chiefs were defeated by Samudragupta and paid tributes in return. The king maintained his own army along with the army sent by the feudatory chiefs. Cavalry, horses and archers became important during the Gupta reign. Land revenue was one of the main sources of income and was set at 1/4 of the produce.