Solution:Statement 1 is correct: India has the largest cropland (or arable land) of any country at 179.8 million hectares, compared with 167.8 million in the US and 165.2 million in China.Russia ranks fourth, while South Asia and Europe are labelled "agricultural capitals of the world," as cropland accounts for more than 80% of some countries in those regions.
In comparison, only about a fifth of land in US and China is dedicated to growing food.
Statement 2 is correct: China's irrigation cover is 41% of cultivated area, and India's is 48%. Hence, India has high proportion of irrigated area.
Statement 3 is incorrect: As a result of this irrigation, China's total sown area is 166 m ha compared to India's gross cropped area of 198 m ha. Even with much lesser land under cultivation.
China produces agricultural output valued at $1,367 billion-more than three times that of India's $407 billion. China's productivity in most crops is 50 to 100% higher than India's.
But UPSC has given the answer as (a) in its official answer key declared.