Wisdom is the third of the "three trainings". first is Sila, or morality and from sila one cultivates Samadhi or concentration (meditation) and from Samadhi arises Pannya or Wisdom.

The ANSWER IS (SILA) for apex

Shantivan is Jawaharlal Nehru's samadhi.

The main practices of Buddhism are: Morality (Sila), Concentration (Samadhi) and Wisdom (Pinna). They are collectively known as the Threefold Path, which leads one to attain Nirvana.

(There are also some ways of merit-making in Buddhism: Donation (Dana), Morality (Sila), and Meditation (Insight, Vipassana).

Samadhi of Jawaharlal Nehru is Shantivana.