Satellite Communication - Engineering

Q1:

Satellite launch sites are invariably located on Eastern seaboards to ensure that

A launch takes place eastward

B expenditure of propulsion fuel is reduced during plane changing

C the satellite achieves circular orbit quickly

D spent rocket motor and other launcher debris falls into the sea

ANS:D - spent rocket motor and other launcher debris falls into the sea

Why not other seaboards like West Bengal only in Sriharikota?