The correct answer is option 3 - Budget session. The legislative control over administration refers to the power of the legislature to oversee and regulate the functioning of the executive branch of the government. This control is exercised through various mechanisms such as discussions, debates, and questioning of ministers.

Option 1 - Zero hour: Zero hour is a specific time during the parliamentary session where members can raise issues of urgent public importance and seek answers from ministers. This falls under legislative control over administration as it allows for direct questioning and accountability.

Option 2 - Adjournment motion: An adjournment motion is a parliamentary procedure that allows members to interrupt the normal business of the house to discuss a specific matter of public importance. This also falls under legislative control as it enables members to hold the executive accountable.

Option 4 - Formulation of a Bill: The formulation of a bill is a legislative process itself, where the legislature proposes, debates, and passes laws. This is a fundamental aspect of legislative control over administration.

Therefore, option 3, the budget session, is the correct answer as it is not directly related to the control and oversight of the functioning of the executive branch.