The Panchsheel, also known as the Five Principles of Peaceful Coexistence, is a set of principles that guide international relations. These principles were first formally outlined in the 1954 Sino-Indian Agreement and have since been used as a basis for relationships between countries.

Option 1 states that mutual respect for each other`s territorial integrity is a laid-down principle of the Panchsheel. This means that countries should not intrude upon or violate the borders and territories of other nations.

Option 2 states that mutual non-aggression is a laid-down principle. This means that countries should refrain from using military force or aggression against each other.

Option 3 states that mutual support for each other in world forums is not a laid-down principle of the Panchsheel. This means that the principle does not require countries to provide support to each other in international organizations or forums.

Option 4 states that mutual non-interference in each other`s internal affairs is a laid-down principle. This means that countries should not interfere or meddle in the internal affairs of other nations.

From the given options, option 3 is the correct answer as mutual support for each other in world forums is not a principle of the Panchsheel. However, it is