In the context of India, which of the following is/are considered to be practice(s) of eco-friendly agriculture ? 1. Crop diversification 2. Legume intensification 3. Tensiometer use 4. Vertical farming Select the correct answer using the code given below:
Options
(a)1, 2 and 3 only
(b)3 only
(c)4 only
(d)1, 2, 3 and 4
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