Verified Answer :

iloveonedirection
A12/45 
12 / 4 = 3
45 / 15 = 3
Proportional

b. 2/7
2 / 4 = 1/2
7 / 15 = 7/15
Disproportional 

c.16/30
16 / 4 = 4
30 / 15 = 2
Disproportional

d.36/75
36 / 4 = 9
75 / 15 =  5
Disproportional

Answer: (a)
tadvisohil886

4/15 = 1.26

The only ratio satisfying the proportion is (A) 12/45 = 1.26. Thus the answer is (A)

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