Which of the following carbanion is most stable?
Some points to check while comparing stability of a carbanion:

Inductive effect: preferentially $\ce{-I}$ effect
Resonance: preferential $\ce{-M}$ effect
Hybridization: preferentially attached to carbon atom having more s-character

... many more: stability
Now the problem is option 1 and 3 are in itself very 'nice' (w.r.t. stability) possible cases of Hybridization-stabilization and Resonance-stabilization respectively.
So the natural (what I thought) way out here is comparing $\ce{pKa}$ 's of acetylene and toluene respectively for option 1 and 3.
from here :

$\ce{pKa}$ of acetylene is about 25.
$\ce{pKa}$ of toluene is about 43.

Less $\ce{pKa}$ denotes how (much more) feasible is for the acid to dissociate by deprotonating itself.
So, acetylene carbanion is more stable than toluene carbanion