Explanation:

Moringa (drumstick tree) is a leguminous evergreen tree.

Incorrect. Moringa, commonly known as the drumstick tree, is not a leguminous tree. It belongs to the Moringaceae family. Leguminous trees belong to the Fabaceae family.

Tamarind tree is endemic to South Asia.

Incorrect. Although tamarind is widely cultivated in South Asia and has been a part of its culinary and cultural traditions, it is believed to be indigenous to tropical Africa. It was later introduced to South Asia.

In India, most of the tamarind is collected as minor forest produce.

Correct. In India, tamarind is mostly collected from natural forests as minor forest produce. It's a significant source of livelihood for many tribal communities.

India exports tamarind and seeds of moringa.

Correct. India is one of the major exporters of both tamarind and moringa seeds. Moringa seeds have gained popularity because of their nutritional value and potential health benefits.

Seeds of moringa and tamarind can be used in the production of biofuels.

Correct. Moringa seeds have been explored for their potential as a biodiesel feedstock. Similarly, research has shown the potential of tamarind seed oil for biodiesel production.

Based on the above evaluations, the correct statements are 3, 4, and 5.

Thus, the correct answer is option 2: 3, 4, and 5.