I think the correct answer is the first option. It has nonpolar bonds and a symmetrical structure. The structure of a BF3 molecule shows a symmetrical trigonal geometry. The net dipole moment of the molecule is zero therefore it is polar.
Read the paper more carefully if you don't understand it
We know that there are 100 cm in 1 m, so we can use this to convert to meters:

Therefore we know that
cm is equal to 2.41 m.