Explanation:

Statements 1 and 2 are correct.

The concept of the stupa is indeed Buddhist in origin. It was used as a religious monument that contained relics, typically the remains of Buddhist monks or nuns.

Stupas were indeed repositories of relics. Relics could include the bodily remains of the Buddha or other important figures, or objects associated with them.

However, the third statement is somewhat misleading. While stupas did serve commemorative purposes, especially those that enshrined important relics, to broadly label them as "votive" might not capture the full range of their religious and cultural significance in the Buddhist tradition. Stupas were also centers of devotion and pilgrimage.

Thus, only two statements (1 and 2) are correct.