Explanation:

All the statements are correct.

• Though food Fortification is expected to bring multiple benefits, it can also cause some adverse impacts. Such as, Hypervitaminosis: Recent studies published in the medical journal Lancet show that both anaemia and Vitamin A deficiencies are overdiagnosed, meaning that mandatory fortification could lead to hypervitaminosis. 
• Toxicity: Adding one or two synthetic chemical vitamins and minerals will not solve the larger problem, and in undernourished populations it can lead to toxicity. A 2010 study that showed iron fortification causing gut inflammation and pathogenic gut microbiota profile in undernourished children. 
• Cartelisation: Mandatory fortification would harm the vast informal economy of Indian farmers and food processors. Instead it will benefit a small group of multinational corporations who will have sway over a Rs.3,000 crore market. Just five corporations have derived most of the benefits of global fortification trends and these companies have historically engaged in cartelising behaviour leading to price hikes. 
• Decrease Value of Natural Food: Once iron-fortified rice is sold as the remedy to anaemia, the value and the choice of naturally iron-rich foods like millets, varieties of green leafy vegetables, etc might be suppressed by a policy of silence. 

Hence option 4th is coorect.