Normal force in Torque

[visual plaza]

I saw the solution to this online but they ignored the existence of the Normal force completely. Wouldn't the torque due to normal force cancel out torque due to weight? Thank you

[brazen sierra]

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[neon thistle]

When the block is about the topple

The normal shifts to the rightmost edge of the cube

so if u balance torque about that point

The torque due to normal would be zero

Thats why they might hve neglected that

btw the ans should be c ig

[visual plaza]

Thank you for helping, yes the answer is given C
I understand there wouldn't be any torque by the normal if it originates from the corner, but isn't that assuming a different start position (just slightly tilted) than the actual one?

[neon thistle]

as we start tilting the Normal eventually gets shifted

Its the toppling condition na it has to topple about a edge of cube so only the edge should be in contact with the floor