Which mixture can create a light peach-like colour?

Correct answer: By adding white to orange

The governing concept is making a tint by lightening a warm base colour. Orange contains the warm red-yellow family, and adding white in a suitable proportion reduces its intensity and creates a pale peach-like appearance; therefore option A is correct. Black added to blue creates a dark blue shade, red added to green usually produces a dull neutral mixture, and yellow added to violet tends to neutralise rather than produce a clean peach tint.