The correct answer is: Only argument I is strong.
Argument I is strong because it is based on a valid reason. Octroi is a tax on goods entering a city or town, and it is often seen as a source of corruption. By abolishing octroi, the government can eliminate this source of corruption and improve the efficiency of the economy.
Argument II is weak because it is based on an assumption that is not necessarily true. It is possible that abolishing octroi could adversely affect government revenues, but it is also possible that the government could find other ways to raise revenue. In addition, the impact of abolishing octroi on government revenues would likely be small compared to the overall size of the government budget.
Therefore, only argument I is strong.