The Directive Principles of State Policy are guidelines for the framing of laws by the government, mentioned in the Indian Constitution.

Option 1 states Prohibition of traffic in human beings and forced labour. While this is a fundamental right guaranteed under Article 23 of the Constitution, it`s not mentioned in the Directive Principles of State Policy. Hence, this statement is incorrect.

Option 2 refers to the Prohibition of consumption except for medicinal purposes of intoxicating drinks and other drugs which are injurious to health. This pertains to Article 47 - one of the Directives, which directs the State to raise the level of nutrition, the standard of living and to improve public health. Hence, this statement is correct.

Option 3 suggests that both 1 and 2 are included in the Directive Principles, which is incorrect as 1 is a fundamental right and not a Directive Principle.

Option 4 indicates that neither 1 nor 2 constitute the Directive Principles of State Policy which is incorrect as 2 belongs to the Directive Principles.

Therefore, the correct answer is 2 which correctly considers the prohibition of unhealthy substances as a Directive Principle.