By which of the following Acts, the system of 'Chamber of Princes' with 120 members was created?

1. A

   Charter Act of 1853

   Charter Act of 1853 claims to have created the Chamber of Princes. This act renewed the East India Company's charter and introduced open competition for civil services, but it did not establish any such chamber.

2. B

   Act of 1793

   Act of 1793 claims to have established the 120-member princes' body. This regulation mainly consolidated Cornwallis's reforms and extended company rule, lacking any modern princely assembly provisions.

3. C

   Act of 1909

   Act of 1909, also known as the Morley-Minto Reforms, claims the introduction of this chamber. While it introduced separate electorates, it predates the formal consultative princely consultative structures of the next decade.

4. D

   Act of 1919

   Act of 1919, officially known as the Government of India Act 1919 or Montagu-Chelmsford Reforms, provided for the creation of the Chamber of Princes (Narendra Mandal) as a consultative and advisory body with 120 members, which was inaugurated in 1921. This option correctly identifies the exact legislative measure enacted to establish the Chamber of Princes, fulfilling all the historical details mentioned in the question stem.

Summary. Official key is (d) corresponding to the Government of India Act of 1919. The Chamber of Princes was established following the recommendations of the Montagu-Chelmsford Reforms to provide a formal forum for rulers of princely states. Aspirants often confuse these reforms with earlier Morley-Minto measures, but Narendra Mandal actually materialized in 1921 under the 1919 framework. Therefore, option (d) is the correct choice because it accurately cites the statutory origin of the 120-member princely assembly.