The correct answer is option 4: One tenth of the total members. In order for a House of Parliament to function, at least one-tenth of the total members must be present. This means that if a House has 100 members, at least 10 members need to be present for it to operate. Option 1 (one-fifth of total members), option 2 (one-sixth of total members), and option 3 (one-seventh of total members) are higher percentages and would require a larger number of members to be present for the functioning of the House. It is important to note that this minimum number of members required for functioning may vary in different parliamentary systems, but based on the provided options, option 4 is the correct answer.