Hello everybody

listen, I have a few questions, simple stuff.

My 3 plants are growing okay but one of them it's still a sprout the fans leaves withered though the other leaves are very very green. Did this plant died? It's almost 4 weeks and it's still a sprout.
As for the other two plants all is fine but I would like to know something please; when a plant grows faster than the others and gets taller than the others does it mean that it will be a male or it's not necessarly so?