The structural formula of ten compounds, (I) through (X) are drawn below, you may select any one of these structure. Answer the following question about that compound.

A. How many chiral centre are present in this compound ?
(a) 0 (b) 1 (c) 2 (d) 3 (e) 4 (f) 5
B. Is this compound chiral or achiral ? C. What symmetry element are present in this compound ?
(a) None (b) Plane of symmetry (c) Center of symmetry

Explanation

`{:("Compound",A,B,C),(I,c,a,a),(II,c,b,b),(III,c,b,b),(IV,c,b,b),(V,c,a,a),(VI,C,a,a),(VII,c,a,a),(VIII,e,b,b),(IX,e,a,a),(X,e,b,b):}`