JNU SIS 2014 Question 23: Theories of international trade

If an economy produces two goods, $X$ and $Y$, with two factors of production, $K$ and $L$, where $X$ is labour-intensive good and $Y$ is capital-intensive good and if the factor intensities of production of the goods are different at any factor price range and are nonreversible, then under the assumption of constant returns to scale, an increase in the supply of labour at constant commodity prices gives rise to