I. The technique of hydroponics was first demonstrated by ...... A ....... . II. Hydroponics is ...

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I. The technique of hydroponics was first demonstrated by ...... A ....... .
II. Hydroponics is used for the commercial production of vegetables like
(A) A-Julius von Sachs, \( B \) - Lettuce
(B) A-Arnon, B-Zea mays
(C) A-Hoagland, B-Blue-berry
(D) A-M Calvin, B-Cotton
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