GCSE Maths Practice: best-value

\( \begin{array}{l} \text{Smoothie offers: A:300ml £1.35, B:500ml £2.00, C:1L £4.20} \\ \text{Which is best value?} \end{array} \)

Choose one option:

\( \text{A} \) \( \text{B} \) \( \text{C} \)