How many of the following is correct statement(s) regarding 1,2-butadiene (I) and 1,3-butadiene is/are
a) I has perpendicular pi planes while II has parallel pi planes
b) Both gives the same products on adding 1.0 equivalent of HBr at `-80^(@)` .
c) I gives 2,2-dibromobutane while II gives 2,3-dibromobutane, when reacted exces of HBr at very low temperature
d) Both have same length of C=C double bonds

Answer

2

Explanation

In cumulene , adjacent pi - bonds are present in perpendicular plane while in conjugated dienes , pi-bonds are present in parallel planes