Sunblock vs Sunscreen

Which one should we desi gals use? What is the difference?

I love being outdoors in summer but tan easily resulting all different tan lines with my t-shirts.

Would wearing sunblock help?

Should we wear sunscreen on face and sunblock on our arms and legs?

Both actually have the same effect..one absorbs sunblock reflects the sun's rays while sunscreen filters the harmful one's. Sunscreens are more popular as they come in oil-free, water-based/gel forms.