Option 1: This option states that the National Development Council includes all central Cabinet Ministers. However, this is not true. The National Development Council is a body that includes the Chief Ministers of all the states, but not the central Cabinet Ministers.

Option 2: This option correctly states that the National Development Council includes the Chief Ministers of all the states. This is true. The Council is chaired by the Prime Minister and consists of all the Chief Ministers of the states, along with members of the central government.

Option 3: This option states that the National Development Council includes both the Cabinet Ministers of the states and the Centre. However, this is not true. The Council only includes the Chief Ministers of the states, not the Cabinet Ministers.

Option 4: This option states that the National Development Council includes members of the Estimates Committee of the Parliament. However, this is not true. The National Development Council is a separate body and does not include members of the Estimates Committee.

Therefore, option 2 is the correct answer as it accurately identifies that the National Development Council includes the Chief Ministers of all the states.