C-11-Q053mediumsingle_mcqab=cd\dfrac{a}{b}=\dfrac{c}{d}ba=dc হলে a2+acb2+bd=?\dfrac{a^2+ac}{b^2+bd} = ?b2+bda2+ac=?aa2b2\dfrac{a^2}{b^2}b2a2bab\dfrac{a}{b}baccd2\dfrac{c}{d^2}d2cdabcd\dfrac{ab}{cd}cdab