Question

Mustard oil or Colza is got from
A) Brassica oleracea
B) Brassica rapa
C) Brassica juncea
D) Brassica campestris

Answer 1

Colza oil is toxic for human consumption. It is a non drying oil.Colza oil is used as a lubricant for machinery. The plant which yields colza oil belongs to the family Brassicaceae.

Complete answer:
To answer this question we have to know about the uses of Plants belonging to the Genus Brassica.
Brassica genus plants are agricultural and horticultural plants. They are used mainly for food and are mostly seasonal plants. These plants grow as small shrubs.

Brassica oleracea- It is popularly known as cabbage. It is used as a leafy vegetable.
Brassica rapa- It is commonly known as field mustard. It yields mustard oil or colza
Brassica juncea- It is called the brown mustard or leaf mustard. It yields edible mustard oil.
Brassica campestris – it is used as a leafy vegetable.

Additional Information: Some characteristic of family Brassicaceae are- flowers are actinomorphic and hermaphrodite. They possess an oblique septum. The style and stigma are short and bifid. They exhibit parietal placentation due to the presence of a superior ovary. One or more than one ovule is present. Leaves are simple and alternate. Petals are polypetalous. Petals are arranged in one whole alternate with sepals called the cruciform arrangement. They show valvate aestivation.

The correct answer is (B). Mustard oil or colza is obtained from Brassica rapa.

Note: Colza is extensively produced in the Netherlands, Denmark, France, Germany, and the United States. It is toxic for human consumption. It is also used as a biodiesel.