Giải phương trình sin^2 ⁡x + sin^2⁡ 3x + sin^2 5x=3/2

A. $x=\frac{\mathrm{\pi }}{12}+k\frac{\mathrm{\pi }}{6}$ hoặc $x=\frac{\mathrm{\pi }}{6}+k\frac{\mathrm{\pi }}{2} \left(k\in \mathrm{\mathbb{Z}}\right)$

B. $x=\frac{\mathrm{\pi }}{12}+k\frac{\mathrm{\pi }}{6}$ hoặc $x=\pm \frac{\mathrm{\pi }}{6}+k\frac{\mathrm{\pi }}{2} \left(k\in \mathrm{\mathbb{Z}}\right)$

C. $x=\pm \frac{\mathrm{\pi }}{12}+k\frac{\mathrm{\pi }}{6}$ hoặc $x=\pm \frac{\mathrm{\pi }}{6}+k\frac{\mathrm{\pi }}{2} \left(k\in \mathrm{\mathbb{Z}}\right)$

D. $x=\pm \frac{\mathrm{\pi }}{12}+k\frac{\mathrm{\pi }}{6}$ hoặc $x=\frac{\mathrm{\pi }}{6}+k\frac{\mathrm{\pi }}{2} \left(k\in \mathrm{\mathbb{Z}}\right)$