Quantity A: $(a+b+c)/5$
Quantity B: $1/5ab + c/5 = (1 + abc)/5ab$

Since there is no restriction on the values of $a, b, c,$ let us take some scenarios:

Let $c = 0$: [Note: $ab$ is not zero; $c$ can be zero]
Quantity A: $(a+b)/5$
Quantity B: $1/5ab$

If $a = b$:
Quantity A: $2a/5$
Quantity B: $1/5a^2$

If $a = 1$: Quantity A = 2/5 and Quantity B = 1/5
=> Quantity A is greater

If $a = -1$: Quantity A = -2/5 and Quantity B = 1/5
=> Quantity B is greater

Thus, there is no relation

Answer D