In the context of cost minimisation by a competitive producer, which one of the following is NOT correct?
A. Marginal rate of technical substitution of the factors equals relative factor price ratio
B. Ratio of marginal physical productivities of the factors equals the ratio of factor prices
C. Slope of the isoquant in question equals slope of the budget line
D. Marginal rate of technical substitution of factors of production divided by relative factor price ratio is zero
Answer: Option D

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