Step 1: Understanding the Concept:
This question focuses on identifying ornamental shrubs based on their primary aesthetic value, specifically selecting those valued for their fragrant flowers rather than foliage or colorful berries.
Step 2: Detailed Explanation:
Let us analyze each of the listed shrubs:
(A) Duranta plumieri (Golden Dewdrop):
This shrub is grown primarily for its attractive purple flowers and clusters of golden-yellow berries.
The flowers are not known for their fragrance.
Thus, (A) is incorrect.
(B) Cestrum nocturnum (Night-Blooming Jasmine):
This is a highly popular ornamental shrub famous for its greenish-white flowers that open at night, releasing an extremely strong and sweet fragrance.
Thus, (B) is correct.
(C) Acalypha hispida (Chenille Plant):
This shrub is grown for its unique, long, pendulous, bright red catkin-like inflorescences.
These flowers are completely odorless.
Thus, (C) is incorrect.
(D) Portlandia grandiflora (Glorious Flower of Cuba):
This is a slow-growing tropical shrub that produces large, white, bell-shaped flowers that release a rich, sweet fragrance, especially during the evening.
Thus, (D) is correct.
Step 3: Final Answer:
Cestrum nocturnum (B) and Portlandia grandiflora (D) are grown for their fragrant flowers.
This corresponds to Option (C).