1293 - Analytical Reasoning

Correct Answer: C

Explanation:

• Three engineers from I, J, K and L must be chosen. The only combination are I J K - I K L - I J L - J K L - I J K L.
• Since I refuses to work with L, combinations I K L, I J L, and I J K L are ruled out. Thus the only combination with the engineer are I J K or J K L
• Since J refuses to work with M, and N refuses to work with O, the engineers I J K could only work with N and P or O and P.
• Thus possible combinations of the five-member groups are I J K N P or I J K O P
• Since J refuses to work with M, and L refuses to work with N, the engineers J K L could only work with O and P. Thus a possible combination of the group is J K L O P
• The only possible combinations are therefore
• I J K N P - I J K O P - J K L O P

From the set of possible combinations : I J K N P, I J K O P, and J K L O P

It can be seen that only statement III is necessarily true