If 1 / 4 of a is equal to 1 / 5 of B, then a must be () B. (a, B are not zero) ① greater than ② less than ③ cannot be determined

If 1 / 4 of a is equal to 1 / 5 of B, then a must be () B. (a, B are not zero) ① greater than ② less than ③ cannot be determined

If both a and B are greater than zero, then a is less than B. if both a and B are less than zero, then a is greater than B. if both a and B are positive and negative, then it is even more uncertain