How many of the following statements are correct?

1)   The products of heating 4- Oxopentanoic acid are butanone and Carbondioxide
2)   Sodium borohydride reduces propanamide to propanamine 
3) 1- Cyclohexene carbaldehyde can be produced from the following starting material 
    and a suitable base 
    

4)   2,3-dimethyl-3-hexene occurs as E and Z isomers
5)   The diastereomer of 2R, 3R- dichloro butane is achiral