The correct answer is option 2: Therigatha.

The Therigatha is a collection of verses believed to have been composed by the female followers of the Buddha. These women, known as theris, were enlightened nuns who played an important role in the early Buddhist community.

Option 1: Sumangalavilasini is not believed to be a compilation of psalms sung by women. Sumangalavilasini is a commentary on the Digha Nikaya, one of the major collections of Buddhist scriptures.

Option 3: Stridharmapaddhati is a Hindu text that provides guidance on the duties and conduct of women.

Option 4: Ritusamhara is a Sanskrit poem by the poet Kalidasa, which describes the various seasons and their associated emotions. It is not related to the psalms sung by women.

Therefore, the correct answer is option 2: Therigatha.