Which one of the following is not amongst India's major export item?

(a) Textiles and garments

(b) Gems and jewellery

(c) Oil and petroleum products

(d) Basmati rice

India is mainly involved in exporting textiles and garments, gems and jewellery, and oil and petroleum products. However, basmati rice is not a major item of India's exports.

Hence, the correct answer is option (d).