The Directive Principles of State Policy in the Constitution of India encompass varied principles reflecting different ideologies. Some of these are based on Gandhian philosophy.

Option 1 is incorrect because the principle of a uniform civil code is not a Gandhian principle. It`s a liberal principle aimed at achieving national integration and gender justice.

Option 2 is correct. Gandhian principles reflected in the Directive Principles of State Policy include organising village Panchayats (2) and promoting cottage industries in rural areas (3). Gandhi advocated for decentralised self-government in villages (Panchayati Raj) and self-reliance through the promotion of cottage industries.

Option 3 is incorrect because, like option 1, securing a uniform civil code (1) isn`t a Gandhian principle.

Option 4 is incorrect as it involves all options and both organizing a uniform civil code (1) and securing for all workers reasonable leisure and cultural opportunities (4) are not Gandhian principles. The latter is a socialist principle, highlighting the dignity of labour and workers` rights.

In summary, the Gandhian principles in the Directive Principles of State Policy are organizing village Panchayats and promoting cottage industries.