1 Answers

Option 1 : T2, T4, T5 and T6

Seven teachers: T1, T2, T3, T4, T5, T6, and T7.

1) Either T1 or T2 should be selected with T5. 

Case - 1 Case - 2
T1 T2
T5 T5
   
   

2) T4 and T7 cannot be selected together.

Either T4 or T7 was selected.

Case - 1 Case - 1(a) Case - 2 Case - 2(a)
T1 T1 T2 T2
T5 T5 T5 T5
T4 T7 T4 T7
       

3) Either T7 or T5 should be selected with T6.

Case - 1(a) and Case - 2(a) get eliminated because T5 and T7 are both not selected together.

Case - 1 Case - 2 Case - 3
T1 T2 T1
T5 T5 T5
T4 T4 T7
T6 T6  

4) Either T3 or T6 should be selected with T2.

So, Case - 1, Case - 3 gets eliminated.

Case - 2
T2
T5
T4
T6

Hence, option (4) is the correct answer.

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