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Night Jasmine, the shrub that emits fragrance during night, is
A. cestrum nocturnum
B. Solanum surattense
C. Brunfelsia hopeana
D. Datura stramonium

Answer
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Hint: Night jasmine is also called as night-blooming jasmine, Lady of night, and queen of the night. And these plants are usually grown in tropical and subtropical regions including the Asia, Australia, Newzealand and other countries, and it is a weed.

Complete answer:
Night Jasmine is also called as night-blooming Cestrum, and the scientific name of this flower is Cestrum Nocturnum. It belongs to the family Solanaceae.
It is an evergreen woody shrub which is 4mm tall.
The leaves of this flower are simple, which is 6 to 20 centimeters long, 2 to 4.5 cm broad, and the leaves are smooth and glossy.
Flowers are greenish-white, with the slender tubular corolla, and having cymose inflorescence.
This flower usually blooms at night and produces a sweet perfume and the fruit of this flower is a berry.
When it comes to varieties of flower, there are others which are yellowish in color.
The plants contain an alkaloid called Solanin.
These plants generally cause some respiratory problems and feverish symptoms for the people who are allergic.
So the answer is Cestrum Nocturnum.
When moving to other options, Solanum Surattense also belongs to Solanaceae, it is eggplant, and also called as yellow fruit nightshade, used as herbs for therapy. So this is the wrong answer.
Brunfelsia hopeana also belongs to Solanaceae, grown as a bonsai plant, it is a fragment producing flower, and it is called ornamental trees, so this is the wrong answer.
Datura stramonium belongs to the family Solanaceae, it is also called devil snare, Thorn apple, it is grown in aggressive climates, it is the wrong answer.

So the answer is Cestrum Nocturnum.

Note: The uses of Cestrum Nocturnum are, it is used as perfumes, and in religion ceremonies and it has wide application in medical field and at the same time as it is a powerful scent, it may cause headache in some persons and it may also cause some allergies, if the flower is ingested at night time.
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