Which one of the following case is the latest case on Section 6(a) of T.P. Act ?

Shehammal v. Hasan Khani Rawther (2011) is the most recent of these decisions: the Supreme Court held that a Muslim heir's expectancy (spes successionis) cannot be transferred, but an heir who has taken consideration for giving up a future share may be estopped from claiming it later.

Gulam Abbas v. Haji Kayyum Ali (1973) is an earlier Supreme Court decision on the same point, and Khanum Jan v. Jan Bibi and Kochunni v. Kunju Pillai are older still.