Reaction-1 : `CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(3)overset(Cl_(2))underset(hv)(to)` Optically active monochloro products (s) are (R) .
Reaction-2 : Optically active di-chloro products (s) are (S).
Reaction-3 :
Optically active di-chloro product (s) are (P).
Reaction-4 : 2-methoxy propane`overset(Cl_(2))underset(hv)(to)` Optically active monochloro product (s) are (Q).
What is the sum of P+Q+R+S?

Explanation