Answer:
1. I was sleeping in bed.
2.Ram will go home.
3. umesh will be helping me.
4. lokesh will have a new bike.
The first one is d
the second is a
the third one is c
if i get u wrong im truly sorry
When you enumerate you need to put comas between all the items except the ones which are connected by "and" : as A is not correct as it does not have comas, and B is incorrect as it has comas where "and" is.
now, in a way both C and D are correct, but C is the usual accepted version, and D is an example of "Oxford coma" (where the coma is optional, to remain on the safe side, choose C).
