JEE Math Practice Question

The value of $$2\sin \left( {{\pi \over 8}} \right)\sin \left( {{{2\pi } \over 8}} \right)\sin \left( {{{3\pi } \over 8}} \right)\sin \left( {{{5\pi } \over 8}} \right)\sin \left( {{{6\pi } \over 8}} \right)\sin \left( {{{7\pi } \over 8}} \right)$$ is :

1. A.$${1 \over {4\sqrt 2 }}$$
2. B.$${1 \over 4}$$
3. C.$${1 \over 8}$$
4. D.$${1 \over {8\sqrt 2 }}$$