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Jaya and Ratna are better-yielding semi-dwarf varieties of:

ARice
BWheat
CMaize
DJowar
Answer & Solution
Correct answer: A. Rice
1. They were developed in India. 2. Both are rice varieties. 3. They followed the IR-8 derivatives. _Source: syllabus Biology, Chapter 9, Strategies for Enhancement in Food Production._
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