The Marginal Physical Product (MPP) is maximum corresponding to the

Correct option is B

✅ (b) point of inflection
· MPP reaches its maximum at the point of inflection on the Total Physical Product (TPP) curve.
· This is where the rate of increase in TPP starts to decline, though TPP itself continues to rise.
· Beyond this point, MPP starts decreasing due to diminishing returns.
❌ (a) Average Physical Product (APP)
· MPP equals APP when APP is at its maximum, but MPP's maximum occurs earlier at the inflection point.
❌ (c) input price and output price ratio
· This refers to profit maximization point, not the biological maximum of MPP.
❌ (d) Total Physical Product (TPP)
· TPP continues to increase after MPP reaches its maximum, but at a decreasing rate.
· Hence, TPP's maximum does not correspond to MPP's maximum.