According to a great philosopher magnanimity in a man implies many other qualities.

Magnanimity refers to the state of being generous or forgiving, especially towards a rival or less powerful person. The opposite of magnanimity would be "meanness", which refers to selfishness, stinginess, or a lack of generosity. This is given in Option C.

Option A: Jealousy refers to resentment or envy of others' success or possessions, which is not the opposite of magnanimity. 

Option B: Enmity means hatred or hostility toward someone, which is not the direct opposite of magnanimity, as magnanimity is more about generosity than just the absence of hostility.

Option D: Poverty refers to a lack of wealth or resources. Magnanimity is about character and generosity, not material wealth. Therefore, poverty is not the opposite.