Dear Atha,

I think you shud try for Msc at bits pilani or core branches in NIT Trichy and warangal. Also you can electrical @ IT BHU and petroleum @ ISM.  As far as Geophyiscs @ IIT roorkee is concerned , its good option but not very preferred one ... So go with field  in which you are interested. 

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Vijay Luxmi

Of Course BITS.U can get civil/chemical at pilani or ne degree at goa/hyderabad or ne dual at pilani

I wud prefer u 2 choose dual as it lets u complete ur post graduation as well

but if u really interested in geophysics,then go for ISM Dhanbad as it is the best place in ASIA to study earth sciences :)