What can be the result of having an unhealthy lunch?\nOptions:\n- become tired\n- spending money\n- obesity\n- obesity\n- heartburn
A step-by-step solution is:
heartburn
Having an unhealthy lunch can cause indigestion.

Indigestion is the problems caused in the digestion of some foods.

Indigestion causes heartburn.

.

Thus, the answer is heartburn