Which of the following is the right of pre-emption?

Pre-emption is "A right to purchase property in preference to other person": when property is sold, the pre-emptor may step into the purchaser's shoes on the same terms.

The Supreme Court in Bishan Singh v Khazan Singh, AIR 1958 SC 838, described it as a right of substitution; it is not a right to buy at a lower price, and it has nothing to do with evicting a tenant.