Answer:
*Bajo de Uñas is the largest string instrument in the rondalla resembling a large guitar. The instrument is plucked with a plectrum made of turtleshell or carabao horn. It provides the fundamental group tone and reinforces the rhythm.
*Guitar is a string instrument with a wooden soundbox with side walls curving upward and a flat back. Its strings are either plucked with a plectrum or strummed. One of the most popular instruments in the Philippines, the guitar provides the choral and rhythmic accompaniment in the rondalla ensemble.
Source:
https://wanderingbakya.com/philippine-traditional-musical-instruments/
