How was the growth in all food grains after the Green Revolution?

Correct — C. The Green Revolution raised food grain output, but it did not raise it evenly.

The new high-yielding variety (HYV) seeds worked best on wheat, and later on rice, so wheat output climbed steeply while pulses and coarse cereals barely moved.

The gains were also concentrated in the assured-irrigation belt of Punjab, Haryana and western Uttar Pradesh rather than spread across the country.

Growth across all food grains was therefore disproportionate, which is option (c).

Why the others are wrong

• (a)
  Unpredictable — Unpredictable describes swings from year to year. Output in the wheat belt rose steadily and predictably after the new seeds arrived, so unpredictability is not what the textbook is describing.
• (b)
  Proportionate — Proportionate would mean every food grain grew at a similar rate. Pulses and coarse cereals lagged far behind wheat, so the growth cannot be called proportionate.
• (d)
  Unitary — Unitary is not a description of growth at all. It belongs to constitutional vocabulary, where it contrasts with federal, and says nothing about how food grain output changed.

The Green Revolution is the shift, from the mid-1960s, to HYV seeds used together with assured irrigation, chemical fertiliser and pesticide.

Its first phase was narrow by design. The seeds then available performed best for wheat, they needed reliable water, and they needed purchased inputs.

So the story is one of uneven spread, crop by crop and state by state. That unevenness is what the textbook means when it calls the growth in food grains disproportionate, and it is the same unevenness that later drove the demand for a second, wider Green Revolution.

Key facts

• HYV seeds in the first phase of the Green Revolution gave their largest gains in wheat, with rice following later.
• The early gains were concentrated in Punjab, Haryana and western Uttar Pradesh, where irrigation was already assured.
• Pulses and coarse cereals were largely left out of the HYV package, so their output lagged behind wheat.
• The Green Revolution let the government procure enough food grains to build buffer stocks.

Common traps

• Reading 'disproportionate' as 'output fell', when total food grain production rose sharply.
• Assuming the package covered pulses, which the early HYV seeds did not.

No directly related past PYQ was found.