The correct option is B More substituted trans alkene product
E1 reaction mechanism goes by formation of stable carbocation and then there will be removal of proton to form a stable alkene product.
More substituted alkenes are more stable than less substituted.
E1 gives saytzeff product which is more substituted alkene.
Also, trans alkenes are more stable than cis due to the less steric hindrance between groups in trans compared to cis.
Hence, more substituted trans alkenes are the major products of E1 elimination reaction.