Question

SINCE LIGHTS COMING FROM BOTH FAR OFF BODIES PLANETS AND STARS DEVIATE AND ARE REFRACTED BUT WHY ONLY STARS TWINKLE NOT PLANETS

Answer 1

Start are very far away from us therefore we can not see their disk and they looks like a point.
When light from stars comes to us through the turbulence atmosphere, point appears to move slightly and producing twinkling effect.

Planets are big enough so that light from one part fills in for another part, so they produce no twinkling effect.