Answer:

To determine the state with the largest number of food insecure people, we need to analyze the given options and identify the state that consistently appears in all of them.

Options:
a) Bihar, Jharkhand and Orissa
b) Bihar, Jharkhand and Gujarat
c) Bihar, Madhya Pradesh and Tamil Nadu
d) Bihar, Chhattisgarh and Karnataka

Analysis:
We can start by examining each option individually to determine the state with the highest number of food insecure people.

Option a) Bihar, Jharkhand and Orissa:
- Bihar, Jharkhand, and Odisha are the states mentioned in this option.
- All three states are located in the eastern part of India.
- Bihar has a high population density and is one of the most impoverished states in India.
- Jharkhand also faces significant poverty and food insecurity issues.
- Odisha is prone to natural disasters like cyclones and floods, which can further exacerbate food insecurity.
- Overall, this option includes three states that are known to have a high prevalence of food insecurity.

Option b) Bihar, Jharkhand and Gujarat:
- Bihar and Jharkhand are the same states as mentioned in option a).
- Gujarat, on the other hand, is a western state known for its relatively better economic conditions compared to Bihar and Jharkhand.
- While Gujarat may have pockets of food insecurity, it is not typically associated with a high prevalence of this issue.
- Therefore, option b) is less likely to have the largest number of food insecure people.

Option c) Bihar, Madhya Pradesh and Tamil Nadu:
- Bihar is the same state mentioned in options a) and b).
- Madhya Pradesh, also known as MP, is a central Indian state with a significant population.
- Tamil Nadu, located in the southern part of India, is generally considered to have better social and economic indicators compared to Bihar and Madhya Pradesh.
- Both Madhya Pradesh and Tamil Nadu face food insecurity challenges, but they do not have the same level of prevalence as Bihar.
- Therefore, option c) is less likely to have the largest number of food insecure people.

Option d) Bihar, Chhattisgarh and Karnataka:
- Bihar is the same state mentioned in all the previous options.
- Chhattisgarh, located in central India, has a relatively high prevalence of food insecurity due to its tribal population and lack of economic development.
- Karnataka, a southern state, is generally considered to have better socioeconomic indicators compared to Bihar and Chhattisgarh.
- While Chhattisgarh may have a significant number of food insecure people, it is less likely to have the largest number compared to Bihar.
- Therefore, option d) is less likely to have the largest number of food insecure people.

Conclusion:
After analyzing all the options, it is evident that the state consistently mentioned in all of them is Bihar. Bihar is known for its high population density, poverty, and food insecurity issues. Therefore, option a) - Bihar, Jharkhand, and Odisha - is the correct answer as it includes Bihar, which has the largest number of food insecure people among the given states.