Which of the following represents a muscle group pair in the human body?
a. biceps and trapezius.
b. hamstrings and gluteus.
c. quadriceps and deltoids.
d. rectus abdominis and erector spinae

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by going smokefree, you could improve the well-being of your friends, family, coworkers, and even your pets. here’s how the cigarettes you smoke affect the people around you.