For voluntary winding up of company by the members which resolution is required:

The correct answer is: A. Ordinary

A voluntary winding up of a company by the members is initiated by a resolution passed by a simple majority of the members present and voting at a general meeting. This resolution is known as an ordinary resolution.

A special resolution is a resolution that is passed by a majority of not less than three-fourths of the members present and voting at a general meeting, and at least two-thirds of the total number of members entitled to vote.

A resolution requiring special notice is a resolution that must be given at least 21 days’ notice to the members of the company.

Therefore, the correct answer is A. Ordinary.