• Statement 1 is correct- Tight monetary policy involves increasing interest rates. Higher interest rates will increase the cost of debt and mortgage repayments and leave people with less money to spend. Therefore, this will reduce their consumption of imports, improving the current account. 
• Statement 3 is correct- This involves reducing the value of the currency against others. (e.g. selling pounds would cause the value of the Pound to fall). If there is a devaluation of the currency, the price of imported goods increases and therefore the quantity demanded of imports falls. Exports will become cheaper, and there will be an increase in the quantity of exports.  
• Statement 2 is correct- Supply side policies can improve the competitiveness of the economy and help make exports more attractive. This can improve the current account position, but it may take considerable time to have an effect.For example, if the government improved the supply chain and built good logistical infrastructure it may help to increase the efficiency. This increased efficiency would translate into lower costs of production and more exports. 

Source- Article