An unknown substance (P) shows optical activity. This optical activity disappears on treatment of (P) with acidified KMnO_(4) (which produces Q), or with heated copper (which produces R). (P) Produces silver mirror with Tollen's reagent, thereby producing (S). (S) is chiral. Based on this information, answer the following questions : Number of stereoisomers possible for (P) is-

An unknown substance (P) shows optical activity. This optical activity

1.	An unknown substance (P) shows optical activity. This optical activity disappears on treatment of (P) with acidified KMnO_(4) (which produces Q), or with heated copper (which produces R). (P) Produces silver mirror with Tollen's reagent, thereby producing (S). (S) is chiral. Based on this information, answer the following questions : Number of stereoisomers possible for (P) is-
Answer» 2 3 4 8 Solution : ONE chiral center MAY have(R) or (S) configuratoin. HENCE, two STEREOISOMERS.