Planned development approach can help in addressing:

Regional disparities
Environmental concerns
Social inequalities
All of the above

The correct answer is D. Planned development approach can help in addressing regional disparities, environmental concerns, and social inequalities.

Regional disparities are differences in economic development and living standards between different regions of a country. Planned development can help to address these disparities by investing in infrastructure and services in poorer regions, and by promoting economic growth in these areas.

Environmental concerns are issues such as pollution, climate change, and biodiversity loss. Planned development can help to address these concerns by promoting sustainable development, which is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Social inequalities are differences in wealth, income, and opportunity between different groups of people. Planned development can help to address these inequalities by promoting social justice, which is the fair distribution of resources and opportunities.

In conclusion, planned development can help to address a wide range of issues, including regional disparities, environmental concerns, and social inequalities.