Step 1: Understanding the Question:
This question tests knowledge of Basmati rice varieties and their export value.
Step 2: Detailed Explanation:
Pusa 1121 is a popular Basmati rice variety that earns the highest share of foreign exchange from rice exports.
It is known for its extra-long grains and good cooking quality.
Other varieties like Improved Pusa Basmati (B), Pusa Basmati 1 (C), and Pusa 1509 (D) also contribute, but Pusa 1121 has the highest share.
Thus, Pusa 1121 is the correct answer.
Step 3: Final Answer:
Thus, Pusa 1121 earns the highest share of foreign exchange from rice exports, which corresponds to option (A).
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