Starting from ethanol and propan-1-ol,how pent-2-ene is prepared using Grignard reagent ?

Explanation

`underset("Ethanol")(CH_(3)CH_(2)OH)underset(PC C)overset([O])(rarr)underset("Ethanol(A)")(CH_(3)CHO),`
`underset("Propan-1-ol")(CH_(3)CH(2)CH(2)OH)overset(HBr)(rarr)CH_(3)CH_(2)CH_(2)Brunderset("ether,"Delta)overset(Mg)(rarr) underset("Propyl magnesium bromide(B)")(CH_(3)CH_(2)CH_(2)MgBr)`
`underset((B))(CH_(2)CH_(2)CH_(2)MgBr)+underset((A))(H_(3)C -underset(H)underset(|)(C)=O) rarr underset("Addition product")(CH_(3)CH_(2)CH_(2)-underset(OMgBr)underset(|)(CH)-CH_(3))overset(H^(+),H_(2)O)(rarr)underset("Pentan-2-ol")(CH_(3)CH_(2)CH_(2)-underset(OH)underset(|)(C)H-CH_(3))`
`underset("Pentan-2-ol")( CH_(3)CH_(2)CH_(2)-underset(OH)underset(|)(C)H-CH_(3))underset(Delta(-H_(2)O))overset("conc."H_(2)SO_(4))(rarr)underset("Pent-2-ene(major)")(CH_(3)CH_(2)CH=CHCH_(3))+underset("Pent-1-ene(minor)")(CH_(3)CH_(2)CH_(2)-CH=CH_(2))`