Statement I : India’s share of world manufacturing output steadily declined during the 19th and the 20th centuries. Statement I : There was no absolute decline in production in India during the colonial rule.

Statement I is true: Historical data shows India’s share of world manufacturing output fell from ~24.5% in 1750 to ~1.7% by 1900. This is a relative decline compared to the rapidly industrializing Western nations.

Statement II is true: While colonial rule 'de-industrialized' traditional sectors like hand-spinning, the mid-19th century onwards saw the rise of modern large-scale industries (textile mills, jute, coal, and Tata Steel). Consequently, the absolute volume of industrial production in India did not experience a net decline over the colonial period; rather, it shifted structure and grew slowly.

Because Statement I describes a relative loss of global standing and Statement II asserts that internal production didn't actually shrink in total volume, Statement II acts as a clarification but not an explanation for why the share declined. The share declined because the West grew exponentially faster.