The scientific name of Neelakuranji is:

The correct answer is Option (2) → Strobilanthus kunthiana

Option (2) Strobilanthus kunthiana — Correct. Strobilanthus kunthiana flowers once in 12 years.

Note: This question is from Chapter 1, Reproduction in Organisms, of the pre-rationalised NCERT book. This chapter is not in the present NCERT book (2026-27). The extract below is from the pre-rationalised edition.

NCERT Extract (Pre-rationalised edition, Chapter 1, Reproduction in Organisms):
Sexual Reproduction – “… A few plants exhibit unusual flowering phenomenon; some of them such as bamboo species flower only once in their life time, generally after 50-100 years, produce large number of fruits and die. Another plant, Strobilanthus kunthiana (neelakuranji), flowers once in 12 years.”