Q.
I. Four Subjects --- Physics, Chemistry, Mathematics and Biology were taught in four consecutive periods of one hour each starting from 8.00 a.m. At what time was the Chemistry period scheduled?I. Mathematics period ended at 10.00 am which was preceded by Biology.
II. Physics was scheduled in the last period.
III. Mathematics period was immediately followed by Chemistry.
Option
A. Only I
B. Only I or II
C. Only II
D. II and III together
E. I and II together or I and III together

• E. I and II together or I and III together
  
  Maths period ended at 10 am , immediately followed by Chemistry ,means Chemistry started at 10 am
  or
  Maths preceded by Biology means Biology started at 8 am and Physics was scheduled at last means it is started at 11 am , so the left time slot is from 10 am to 11 am , so Chemistry was scheduled at 10 am
  
• 11 years agoHelpfull: Yes(7) No(0)
• answer is E ) I and II together or I and III together
• 11 years agoHelpfull: Yes(0) No(0)