Jaya' and 'Ratna' are varieties of:

Question

Accepted Answer

Explanation:

1. **Correct Answer: Option 4 - Rice**

'Jaya' and 'Ratna' are indeed varieties of rice. These varieties have been developed to improve yield, disease resistance, and adaptability to different environmental conditions. Rice is a staple food for a large portion of the world's population, particularly in Asia, and the development of different varieties like 'Jaya' and 'Ratna' is crucial for ensuring food security and meeting the dietary needs of growing populations. These varieties are specifically bred to enhance productivity and are well-suited to the climatic conditions where rice is predominantly grown.

2. **Why Other Options are Incorrect:**

- **Option 1: Wheat**
     Wheat is a cereal grain that is a staple food in many parts of the world, particularly in Europe and North America. However, 'Jaya' and 'Ratna' are not varieties of wheat. Wheat varieties have different names, such as 'Durum' or 'Emmer', and are developed with specific traits suitable for bread-making or pasta production, which are distinct from rice varieties.

- **Option 2: Maize**
     Maize, also known as corn, is another major cereal crop. It is primarily grown in the Americas and is used for food, fodder, and industrial products. Maize varieties have names like 'Dent' or 'Flint', which are different from rice varieties. 'Jaya' and 'Ratna' do not belong to maize, as they are specifically rice varieties.

- **Option 3: Cow-pea**
     Cow-pea is a legume, not a cereal grain like rice, wheat, or maize. It is grown for its edible beans and is an important source of protein in many parts of Africa and Asia. Varieties of cow-pea have different names, such as 'Black-eyed pea' or 'Southern pea', which are unrelated to rice varieties. 'Jaya' and 'Ratna' are not associated with cow-pea.

In summary, 'Jaya' and 'Ratna' are specifically rice varieties, and the other options do not relate to these names. Therefore, Option 4 is the correct answer.