Correct Answer: (b) Liberia
Solution:Land-locked Countries are those which do not have a Coastline. There are total 45 land-locked countries in the world which are as follows:| Country | Country | Country |
|---|
| Afghanistan | Andorra | Armenia |
| Austria | Azerbaijan | Belarus |
| Bhutan | Bolivia | Botswana |
| Burkina Faso | Burundi | Central African Republic |
| Chad | Czech Republic | Ethiopia |
| Hungary | Kazakhstan | Kyrgyzstan |
| Laos | Lesotho | Liechtenstein |
| Luxembourg | North Macedonia | Malawi |
| Mali | Moldova | Mongolia |
| Nepal | Niger | Paraguay |
| Rwanda | San Marino | South Sudan |
| Serbia | Slovakia | Eswatini |
| Switzerland | Tajikistan | Turkmenistan |
| Uganda | Uzbekistan | Vatican City |
| Zambia | Zimbabwe | Kosovo |