The correct answer is 6%.
The rate of interest to be allowed to a partner for Advances/Loans given, assuming the partnership deed stays silent on the matter, is 6% p.a. This is the rate of interest that is generally considered to be fair and reasonable.
Option A: 4% is too low. This rate of interest would not be enough to compensate the partner for the use of their money.
Option B: 5% is a bit low, but it is still a reasonable rate of interest.
Option C: 6% is the rate of interest that is generally considered to be fair and reasonable.
Option D: 8% is too high. This rate of interest would be unfair to the other partners, as it would give the partner who made the loan an unfair advantage.
Option E: 10% is too high. This rate of interest would be considered usury in most jurisdictions.
In conclusion, the rate of interest to be allowed to a partner for Advances/Loans given, assuming the partnership deed stays silent on the matter, is 6% p.a.