A long day biennial crop requires two seasons to produce seed.

Correct option is D

Correct answer – (d) Sugar beet is a biennial crop and requires two seasons to complete its life cycle. It needs long day conditions for flowering and seed production. Hence, sugar beet fits as a long day biennial crop.
Information Booster / Facts Biennial crops complete vegetative growth in first season and seed production in second season. Sugar beet is widely grown for sugar and seed production under suitable photoperiod.
Why other options are incorrect (a) Cluster bean is an annual crop. (b) Jute is an annual crop. (c) Cotton is a long duration crop but not biennial for seed.