A:
25. If you have three quarters, four dimes, and four pennies, you have $1.19. You also have the largest amount of money in coins without being able to make change for a dollar (good to know.)

B:
#25 on your list is obviously wrong. With coins in denominations of 1/2, 1 cent, 2, 3, 5, 10, 20, 25, and 50 cents, and 1, 2.5, 3, 4, 5, 10, 20, 25, 50, and 100 dollars ( all US coins), there is no limit to the amount that one might have and still not be able to make change for a dollar.

B misses the point of the original statement entirely.

For example, to demonstrate that A is correct, take the coins (and numbers) specified, and try to make up a dollar exactly from just those coins.

Hint: try adding another penny...

:-)