Match List-I (Theories of Population) with List-II (Propounders of Theories) and select the correct answer using the code given below.List IList IIA. Optimum Population Theory1. ThompsonB. Social Mal-adjustment Theory2. MalthusC. Demographic Transition Theory3. Edwin CannanD. Population-Food Supply Relationship Theory4. Henry GeorgeMatch List-I (Theories of Population) with List-II (Propounders of Theories) and select the correct answer using the code given below.

1. A

   A-(3), B-(4), C-(1), D-(2)

   Option A claims that Optimum Population Theory was propounded by Edwin Cannan, Social Mal-adjustment Theory by Henry George, Demographic Transition Theory by Thompson, and Population-Food Supply Relationship Theory by Thomas Malthus. This precise matching accurately pairs all population theories with their correct respective propounders as established in demographic studies. Therefore, this option represents the exact correct combination required by the question.

2. B

   A-(2), B-(3), C-(4), D-(1)

   Option B incorrectly pairs Optimum Population Theory with Malthus and Social Mal-adjustment Theory with Edwin Cannan. These misaligned attributions fail to match the established historical proponents of these demographic models. Hence, this option is incorrect.

3. C

   A-(1), B-(2), C-(3), D-(4)

   Option C wrongly assigns Optimum Population Theory to Thompson and Social Mal-adjustment Theory to Malthus. Such incorrect pairings violate the standard accepted framework of population theories. Thus, this option is invalid.

4. D

   A-(4), B-(3), C-(1), D-(2)

   Option D incorrectly links Optimum Population Theory to Henry George and Social Mal-adjustment Theory to Cannan. These mismatches render the overall sequence entirely wrong. Consequently, this option is rejected.

Summary. Official key is (a) A-(3), B-(4), C-(1), D-(2). The question tests the correct pairing of population theories with their respective propounders from demographic history. Candidates often confuse the authors of the Optimum Population Theory and the Population-Food Supply Relationship Theory. Carefully verifying each theorist prevents common mix-ups regarding Malthus and Cannan. Only option (a) successfully maps all four theories to their correct originators without any errors.