Option 1 states that India`s trade with China did not have a significant increase between the years 2001-2010 due to border problems. This option suggests that there was an impact on trade due to the border issues.

Option 2 suggests that the stand-off between India and China on Pakistan and Arunachal Pradesh hindered India`s trade growth with China in the years 2001-2010 compared to the years 1991-2001. This option implies that political tensions affected the growth of trade between the two countries.

Option 3 states that while India-China trade saw a significant increase between 2001-2010, both countries ensured a balance in their trade. This option suggests that there was a focus on fair trade between India and China during this period.

Option 4, which is the correct answer, states that India`s trade with China experienced a significant increase between the years 2001-2010 despite the ongoing border problems. This option implies that the border issues did not impede the growth of trade between the two countries.

In summary, option 4 correctly states that India`s trade with China had a notable increase during the years 2001-2010, despite border problems.