Question

Cinchona, isabgol, neem and Rauwolfia are
A. Oil yielding plant
B. Medicinal plant
C. Fibre plant
D. Food plant.

Answer 1

Hint: Plants are important components in any ecosystem. They are the autotrophic organism and produce their own food through the process of photosynthesis. Plants are utilised in various ways such as crops, fodder, ornamental uses, and oil and as medicines. The use of different parts of the plants are used as medicine or medicinal extracts.

Complete answer:
Plants are used in different ways. They are an indispensable part of the ecosystem as they are the producers and produce their own food through the photosynthetic process. The plants form the basis of any type of ecosystem as they are needed to support the other animals. Plants are used by humans in different ways. Plants are used as medicine as several parts of the plants are known to be useful. More than seven thousand plants are known to have medicinal usage.
Medicinal plants are a major resource and used in both traditional and herbal industry. The plants are used as medicine or for medicinal purposes. Several plants such as turmeric, aloe vera, neem etc. are known to have therapeutic properties and are actively used in treatment and protection against several diseases.
Cinchona officinalis is an important medicinal plant and the bark of the tree is used to produce quinine. Quinine is used as an anti-fever agent and it is used in the prevention and treatment of malaria. In addition to this, several other types of alkaloids are also extracted from this tree. It is also used in treatment of blood vessel disorders, stomach disorders and leg cramps.
Isabgol or Psyllium husk is derived from the seeds of isabgol plants. It is mainly used in the treatment of constipation and is also utilised in treatment of other diseases. It is used as a good remedy to relieve constipation and other stomach ailments. The insoluble fibres help as a laxative agent and improves gut movement.
Neem or azadirachta indica is an important plant and used as a major medicinal plant. All the different parts of the plant including the leaves, flowers, fruits, and even barks are used in making medicines. The leaf of the plant is used for eye disorders, intestinal worms, stomach problems, diabetes and also in the treatment of various types of skin ailments. The other parts of the tree such as bark is used for malaria, and intestinal ulcers etc.
Rauwolfia serpentina is used as an important and effective treatment for high blood pressure. The plant produces alkaloids which effects on the nervous impulses and causes to decrease the blood pressure. The roots of the plants are grounded and used as tablets.

Therefore, the correct option is option B.

Note:
The different types of plants such as cinchona, neem, isabgol and Rauwolfia are used as medicinal plants. The plants are used in the treatment and prevention of several ailments. Different parts of the plants are used to extract important chemicals. The chemicals are used for treating several diseases and are known to produce no or mere amount of side effects.