To determine the choice of T, let's analyze the information provided and organize it logically:

1. There are seven family members with four males. Each has a different favorite holiday destination: France, England, Canada, Japan, Singapore, Australia, and Germany.
2. No lady prefers Germany or England.
3. The eldest member prefers England.
4. W's choice is Canada. W is younger than Y, who prefers Japan.
5. V prefers Singapore, is elder to T, and younger to W.
6. Z's wife is the youngest.
7. X is younger to T, elder only to U, is unmarried, and prefers France.
8. The one choosing Germany is not the youngest.

Let's denote the gender of the family members:

• According to point 6, Z's wife is the youngest and hence must be a female.
• According to point 7, X is an unmarried lady.
• Since ladies cannot choose England or Germany, they must be males.

To get the order by age and preference:

• The eldest chooses England and must be one among the male members (not a lady).
• X is the second youngest because she is elder only to U.
• Y prefers Japan and is elder to W, who prefers Canada.
• V is younger than W and elder than T.
• Germany is not chosen by the youngest member, so T can choose Germany.

From these observations:

1. The order of age (from eldest to youngest): Eldest with England, Y (Japan), W (Canada), V (Singapore), T (Germany), X (France), and Z's wife (Youngest).
2. T's choice is Germany.

Thus, the correct choice of T is Germany.