A popular devotional folk song genre with philosophical themes:

Bhajans
Dasa Sahitya
Vachanas
Janapada Geethe

The correct answer is: A) Bhajans.

Bhajans are a genre of devotional Hindu music that is typically sung in praise of a deity or a religious figure. They are often accompanied by instruments such as the harmonium, tabla, and sitar. Bhajans are typically sung in a simple, repetitive style, and they often have a strong emotional appeal.

Dasa Sahitya is a genre of Kannada literature that was written by the 12th-16th century Vaishnava saints known as Dasas. Dasa Sahitya is characterized by its use of simple language and its focus on the devotional aspects of Vaishnavism.

Vachanas are a genre of Kannada literature that was written by the 12th-13th century Lingayat saints known as Virashaivas. Vachanas are characterized by their use of simple language and their focus on the philosophical aspects of Lingayatism.

Janapada Geethe are a genre of folk songs that are popular in the Indian states of Andhra Pradesh, Telangana, Karnataka, and Maharashtra. Janapada Geethe are typically sung in a simple, repetitive style, and they often have a strong emotional appeal.

Bhajans are a popular devotional folk song genre with philosophical themes. They are typically sung in praise of a deity or a religious figure, and they often have a strong emotional appeal. Bhajans are typically accompanied by instruments such as the harmonium, tabla, and sitar.