To constitute a conspiracy under section 121A, I.P.C.
1
it is necessary that any act or omission shall take place in pursuance thereof.
2
it is not necessary that any act or illegal omission shall take place in pursuance thereof.
3
it is not necessary that any unlawful act or illegal omission shall take place in pursuance thereof.
4
it is necessary that any unlawful act or illegal omission shall take place in pursuance thereof.