a. 17 to 21:1
b. 7.5 to 8.5:1
c. 30 to 40:1
d. 1 to 5:1
Ans: a
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a. 17 to 21:1
b. 7.5 to 8.5:1
c. 30 to 40:1
d. 1 to 5:1
Ans: a