Misc: What group's top selling lp was Rumors?

Questions

In the ABO system, which blood type is the universal donor?

When measuring a horse, how many inches are there in one 'hand'?

What kind of construction is Tower Bridge in London?

On a 'qwerty' keyboard, what is the extreme left-hand letter on the middle row of letters?

In the Bible, who is generally considered responsible for writing most of the Psalms -74 in all?