Final answer:
In 2011, India planned to spend $10 billion on rail development and improvement as part of its initiative to upgrade its transportation infrastructure. option b is answer
Step-by-step explanation:
India, recognizing the need to enhance its transportation infrastructure, particularly its railway system, planned a significant investment in 2011. The correct answer to the amount planned to spend solely on rail development and improvement is b) $10 billion.
This investment was a part of India's effort to upgrade and expand its rail network, which is crucial for commuting and economic growth. Every day, millions of people use the railways in Mumbai alone, and the improvement plan was aimed to cater to the growing demand and to modernize the transportation system. option b is answer