Question

The number of chiral centers in the following compound are:

Answer 1

Typically, a chiral center is attached to four different groups. The term has largely been replaced by "chirality center" or stereocenter/stereogenic center.

The recent definition is that the carbon of interest be attached to four different groups such that interchanging any two groups will produce a non-superimposable mirror image of the first arrangement. Going by this, we have 4 (shown starred):