क्लासिकल माल्थसवादी जनसंख्या विचार के अनुसार, निवारक उपायों (प्रिवेंटिव चेक्स) में मुख्य रूप से शामिल हैं:

Assertion (A): Malthus believed population growth automatically improves living standards. Reason (R): He argued resources increase faster than population.

Consider the following statements about Malthusian theory: (a) Population grows geometrically. (b) Food production grows arithmetically. (c) Preventive checks increase mortality. (d) Positive checks include famine and disease. Which of the above statements are true?