On which day of the week was Shahid born ? I. Shahid's mother correctly mentions that he was born before Friday and after Tuesday. II. Shahid's father correctly remembers that Shahid was not born on a Wednesday.

Data sufficiency questions are designed to check your ability to analyse & categorise information based on underlying concepts rather than calculations. So you should try to observe -  analyse and to find linkages between various statements rather soing lengthy calculations.