Effect: The prices of petroleum products have increased by about twenty per cent in the past two months.
Which of the following can be a probable cause of the above effect?
1) The prices of foodgrains and vegetables have shot up by more than thirty per cent.
2) The truck owners association has decided to increase their rent by about 20 per cent with immediate effect.
3) The prices of crude oil in the international market have increased considerably during the past few weeks.
4) People have decided to demonstrate against the Govt's apathy towards rise in prices of essential commodities.
5) None of these

Explanation

3, The prices of crude oil in the international market have increased considerably during the past few weeks.