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Explanation:

Let us calculate the yield for the crops given in the options for the year 2008:
Moth = 250/1199 ≈ 0.21
Sesamum = 70/280 ≈ 0.25
Millets = 4/15 ≈ 0.27
Moong = 260/725 ≈ 0.36
Arhar = 9/19 ≈ 0.47
Urd = 35/102 ≈ 0.34
Chaula = 30/101 ≈ 0.30
The bottom three crops by yield are Moth, Sesamum and Millets.
Hence, option (a).