Solution
H.C.F. $$(\frac{a}{b},\frac{c}{d})=\frac{H.C.F.(a,c)}{L.C.M.(b,d)}$$
Fractions : $$\frac{3}{4}$$ and $$\frac{12}{13}$$
Now, H.C.F. (3,12) = 3
and L.C.M. (4,13) = 52
=> Highest common factor of $$\frac{3}{4}$$ and $$\frac{12}{13}$$ = $$\frac{3}{52}$$
=> Ans - (B)
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