Step 1: Understanding the Concept:
The Indian Agricultural Research Institute (IARI) is the premier national institute for agricultural research, education, and extension in India.
To address region-specific agricultural challenges, ICAR has established additional campuses of this premier institute in other states.
Step 2: Detailed Explanation:
Statement I is correct because the historic, main campus of the ICAR-Indian Agricultural Research Institute is situated in Pusa, New Delhi.
Statement II is also correct because a major new campus, ICAR-IARI Jharkhand, was established at Gauria Karma in the Hazaribagh district of Jharkhand to promote agricultural research and education in Eastern India.
Both statements correctly represent existing campuses of the ICAR-IARI.
Step 3: Final Answer:
Since both statements are correct, the correct choice is option (A).