Answer:
3
Explanation:
When cyclopropane is subjected to chlorination , the dichloro products formed are:
It will form two geometrical isomers in which either both the chlorine atom are either cis or trans. ( 2 isomers)
It will form only one isomer as all the three carbons are same in cyclopropane.
Thus, number of isomers = 3
The structures are drawn in image below.
