The correct options are
A To value and preserve the rich heritage of our composite culture.
B To abide by the Constitution and respect its ideals and institutions, the National Flag and the National Anthem.
C To defend the motherland in times of war.
Fundamental Duties are defined as the moral obligations of all citizens to help promote a spirit of patriotism and to uphold the unity of India. Currently, the Indian Constitution lists eleven Fundamental Duties of its citizens.
Among the options listed, the first three are three of the Fundamental Duties of Indian citizens, among the eleven listed in the Constitution.